Refine your search
2 vulnerabilities found for cloak by danielberkompas
CVE-2026-94206 (GCVE-0-2026-94206)
Vulnerability from cvelistv5
Published
2026-10-06 08:38
Modified
2026-10-06 11:36
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-916 - Use of Password Hash With Insufficient Computational Effort
Summary
Use of Password Hash With Insufficient Computational Effort vulnerability in danielberkompas cloak_ecto and danielberkompas cloak allows an attacker who holds the hashed values and the configured secret to brute-force low-entropy plaintexts much faster than configured.
The dump/1 callback that Cloak.Ecto.PBKDF2 (Cloak.Fields.PBKDF2 in cloak before the Ecto code moved to cloak_ecto) injects into a field module calls :pbkdf2.pbkdf2/4 with config[:size] in the iteration-count position. The :iterations setting is validated but never used. With the cloak_ecto defaults (iterations: 600_000, size: 32) each hash runs 32 PBKDF2 rounds instead of 600,000, so offline guessing of values such as email addresses costs about 18,750 times less than configured.
This issue affects cloak_ecto: from 1.0.0-alpha.0 onward; cloak: from 0.7.0 before 1.0.0-alpha.0.
References
Impacted products
| Vendor | Product | Version | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| danielberkompas | cloak_ecto |
Version: 1.0.0-alpha.0 ≤ cpe:2.3:a:danielberkompas:cloak_ecto:*:*:*:*:*:*:*:* |
|||||||||||||||||
|
|||||||||||||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-94206",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-06T11:34:00.942993Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-06T11:36:25.466Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://repo.hex.pm",
"cpes": [
"cpe:2.3:a:danielberkompas:cloak_ecto:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.Cloak.Ecto.PBKDF2\u0027"
],
"packageName": "cloak_ecto",
"packageURL": "pkg:hex/cloak_ecto",
"product": "cloak_ecto",
"programFiles": [
"lib/cloak_ecto/types/pbkdf2.ex"
],
"repo": "https://github.com/danielberkompas/cloak_ecto",
"vendor": "danielberkompas",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "1.0.0-alpha.0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:danielberkompas:cloak_ecto:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.Cloak.Ecto.PBKDF2\u0027"
],
"packageName": "danielberkompas/cloak_ecto",
"packageURL": "pkg:github/danielberkompas/cloak_ecto",
"product": "cloak_ecto",
"programFiles": [
"lib/cloak_ecto/types/pbkdf2.ex"
],
"repo": "https://github.com/danielberkompas/cloak_ecto",
"vendor": "danielberkompas",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "a8fa1642b02f1c445a1ee8794c9095eb0921f8f3",
"versionType": "git"
}
]
},
{
"collectionURL": "https://repo.hex.pm",
"cpes": [
"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.Cloak.Fields.PBKDF2\u0027"
],
"packageName": "cloak",
"packageURL": "pkg:hex/cloak",
"product": "cloak",
"programFiles": [
"lib/cloak/fields/pbkdf2.ex"
],
"repo": "https://github.com/danielberkompas/cloak",
"vendor": "danielberkompas",
"versions": [
{
"lessThan": "1.0.0-alpha.0",
"status": "affected",
"version": "0.7.0",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.Cloak.Fields.PBKDF2\u0027"
],
"packageName": "danielberkompas/cloak",
"packageURL": "pkg:github/danielberkompas/cloak",
"product": "cloak",
"programFiles": [
"lib/cloak/fields/pbkdf2.ex"
],
"repo": "https://github.com/danielberkompas/cloak",
"vendor": "danielberkompas",
"versions": [
{
"lessThan": "681c9702b7cd9afe0e5a840751ab009f550c69a9",
"status": "affected",
"version": "8699e6417a162c39d9f0ef63511bd23d3f38d1d2",
"versionType": "git"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:danielberkompas:cloak_ecto:*:*:*:*:*:*:*:*",
"versionStartIncluding": "1.0.0-alpha.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*",
"versionEndExcluding": "1.0.0-alpha.0",
"versionStartIncluding": "0.7.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Peter Ullrich"
},
{
"lang": "en",
"type": "reporter",
"value": "Peter Ullrich"
},
{
"lang": "en",
"type": "coordinator",
"value": "Jonatan M\u00e4nnchen / EEF"
}
],
"dateAssigned": "2026-10-06T08:35:00.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eUse of Password Hash With Insufficient Computational Effort vulnerability in danielberkompas cloak_ecto and danielberkompas cloak allows an attacker who holds the hashed values and the configured secret to brute-force low-entropy plaintexts much faster than configured.\u003c/p\u003e\n\u003cp\u003eThe \u003ccode\u003edump/1\u003c/code\u003e callback that \u003ccode\u003eCloak.Ecto.PBKDF2\u003c/code\u003e (\u003ccode\u003eCloak.Fields.PBKDF2\u003c/code\u003e in cloak before the Ecto code moved to cloak_ecto) injects into a field module calls \u003ccode\u003e:pbkdf2.pbkdf2/4\u003c/code\u003e with \u003ccode\u003econfig[:size]\u003c/code\u003e in the iteration-count position. The \u003ccode\u003e:iterations\u003c/code\u003e setting is validated but never used. With the cloak_ecto defaults (\u003ccode\u003eiterations: 600_000\u003c/code\u003e, \u003ccode\u003esize: 32\u003c/code\u003e) each hash runs 32 PBKDF2 rounds instead of 600,000, so offline guessing of values such as email addresses costs about 18,750 times less than configured.\u003c/p\u003e\n\u003cp\u003eThis issue affects cloak_ecto: from 1.0.0-alpha.0 onward; cloak: from 0.7.0 before 1.0.0-alpha.0.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "Use of Password Hash With Insufficient Computational Effort vulnerability in danielberkompas cloak_ecto and danielberkompas cloak allows an attacker who holds the hashed values and the configured secret to brute-force low-entropy plaintexts much faster than configured.\n\nThe `dump/1` callback that `Cloak.Ecto.PBKDF2` (`Cloak.Fields.PBKDF2` in cloak before the Ecto code moved to cloak_ecto) injects into a field module calls `:pbkdf2.pbkdf2/4` with `config[:size]` in the iteration-count position. The `:iterations` setting is validated but never used. With the cloak_ecto defaults (`iterations: 600_000`, `size: 32`) each hash runs 32 PBKDF2 rounds instead of 600,000, so offline guessing of values such as email addresses costs about 18,750 times less than configured.\n\nThis issue affects cloak_ecto: from 1.0.0-alpha.0 onward; cloak: from 0.7.0 before 1.0.0-alpha.0."
}
],
"value": "Use of Password Hash With Insufficient Computational Effort vulnerability in danielberkompas cloak_ecto and danielberkompas cloak allows an attacker who holds the hashed values and the configured secret to brute-force low-entropy plaintexts much faster than configured.\n\nThe dump/1 callback that Cloak.Ecto.PBKDF2 (Cloak.Fields.PBKDF2 in cloak before the Ecto code moved to cloak_ecto) injects into a field module calls :pbkdf2.pbkdf2/4 with config[:size] in the iteration-count position. The :iterations setting is validated but never used. With the cloak_ecto defaults (iterations: 600_000, size: 32) each hash runs 32 PBKDF2 rounds instead of 600,000, so offline guessing of values such as email addresses costs about 18,750 times less than configured.\n\nThis issue affects cloak_ecto: from 1.0.0-alpha.0 onward; cloak: from 0.7.0 before 1.0.0-alpha.0."
}
],
"impacts": [
{
"capecId": "CAPEC-55",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eAn attacker who obtains a database dump and the PBKDF2 secret can recover hashed values with low entropy, such as email addresses, by offline guessing at a cost far below what the configuration promises.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "An attacker who obtains a database dump and the PBKDF2 secret can recover hashed values with low entropy, such as email addresses, by offline guessing at a cost far below what the configuration promises."
}
],
"value": "An attacker who obtains a database dump and the PBKDF2 secret can recover hashed values with low entropy, such as email addresses, by offline guessing at a cost far below what the configuration promises."
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-916",
"description": "CWE-916 Use of Password Hash With Insufficient Computational Effort",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-06T08:38:04.584Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"name": "EEF CNA record for CVE-2026-94206",
"tags": [
"related",
"third-party-advisory"
],
"url": "https://cna.erlef.org/cves/CVE-2026-94206.html"
},
{
"name": "OSV record EEF-CVE-2026-94206",
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-94206"
},
{
"name": "Introducing commit a8fa164 in danielberkompas/cloak_ecto",
"tags": [
"related"
],
"url": "https://github.com/danielberkompas/cloak_ecto/commit/a8fa1642b02f1c445a1ee8794c9095eb0921f8f3"
},
{
"name": "Introducing commit 8699e64 in danielberkompas/cloak",
"tags": [
"related"
],
"url": "https://github.com/danielberkompas/cloak/commit/8699e6417a162c39d9f0ef63511bd23d3f38d1d2"
},
{
"name": "Fix commit 681c970 in danielberkompas/cloak",
"tags": [
"patch"
],
"url": "https://github.com/danielberkompas/cloak/commit/681c9702b7cd9afe0e5a840751ab009f550c69a9"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Cloak PBKDF2 field ignores the configured iteration count and runs only :size rounds",
"workarounds": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eOverride \u003ccode\u003edump/1\u003c/code\u003e in the field module that uses \u003ccode\u003eCloak.Ecto.PBKDF2\u003c/code\u003e, so that it calls \u003ccode\u003e:pbkdf2.pbkdf2/5\u003c/code\u003e with the configured \u003ccode\u003e:iterations\u003c/code\u003e and \u003ccode\u003e:size\u003c/code\u003e. Then recompute all stored hashes, because the existing values no longer match.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "Override `dump/1` in the field module that uses `Cloak.Ecto.PBKDF2`, so that it calls `:pbkdf2.pbkdf2/5` with the configured `:iterations` and `:size`. Then recompute all stored hashes, because the existing values no longer match."
}
],
"value": "Override dump/1 in the field module that uses Cloak.Ecto.PBKDF2, so that it calls :pbkdf2.pbkdf2/5 with the configured :iterations and :size. Then recompute all stored hashes, because the existing values no longer match."
}
],
"x_proofOfConcept": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003col\u003e\n\u003cli\u003eDefine a field module with \u003ccode\u003euse Cloak.Ecto.PBKDF2\u003c/code\u003e and configure only a \u003ccode\u003e:secret\u003c/code\u003e, so that the defaults \u003ccode\u003eiterations: 600_000\u003c/code\u003e and \u003ccode\u003esize: 32\u003c/code\u003e apply.\u003c/li\u003e\n\u003cli\u003eCall \u003ccode\u003edump/1\u003c/code\u003e on a value.\u003c/li\u003e\n\u003cli\u003eCompare the result with \u003ccode\u003e:pbkdf2.pbkdf2({:hmac, :sha256}, value, secret, 32)\u003c/code\u003e and with the same call at 600,000 rounds. It matches the 32-round hash, not the 600,000-round hash, and returns in microseconds instead of about one second.\u003c/li\u003e\n\u003c/ol\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "1. Define a field module with `use Cloak.Ecto.PBKDF2` and configure only a `:secret`, so that the defaults `iterations: 600_000` and `size: 32` apply.\n2. Call `dump/1` on a value.\n3. Compare the result with `:pbkdf2.pbkdf2({:hmac, :sha256}, value, secret, 32)` and with the same call at 600,000 rounds. It matches the 32-round hash, not the 600,000-round hash, and returns in microseconds instead of about one second."
}
],
"value": "* Define a field module with use Cloak.Ecto.PBKDF2 and configure only a :secret, so that the defaults iterations: 600_000 and size: 32 apply.\n* Call dump/1 on a value.\n* Compare the result with :pbkdf2.pbkdf2({:hmac, :sha256}, value, secret, 32) and with the same call at 600,000 rounds. It matches the 32-round hash, not the 600,000-round hash, and returns in microseconds instead of about one second."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-94206",
"datePublished": "2026-10-06T08:38:04.584Z",
"dateReserved": "2026-09-24T09:30:02.102Z",
"dateUpdated": "2026-10-06T11:36:25.466Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-95105 (GCVE-0-2026-95105)
Vulnerability from cvelistv5
Published
2026-10-06 08:37
Modified
2026-10-06 11:40
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-649 - Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking
Summary
Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.
Cloak.Ciphers.AES.CTR encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. decrypt/2 checks only the key tag and the minimum length before it returns the plaintext, and Cloak.Ciphers.Deprecated.AES.CTR decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.
This issue affects cloak: from 0.1.0-pre onward.
References
| URL | Tags | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| danielberkompas | cloak |
Version: 0.1.0-pre ≤ cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:* |
|||||||
|
|||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-95105",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-06T11:37:58.212117Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-06T11:40:42.775Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://cna.erlef.org/cves/CVE-2026-95105.html"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://repo.hex.pm",
"cpes": [
"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027",
"\u0027Elixir.Cloak.Ciphers.Deprecated.AES.CTR\u0027"
],
"packageName": "cloak",
"packageURL": "pkg:hex/cloak",
"product": "cloak",
"programFiles": [
"lib/cloak/ciphers/aes_ctr.ex",
"lib/cloak/ciphers/deprecated/aes_ctr.ex"
],
"programRoutines": [
{
"name": "\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027:encrypt/2"
},
{
"name": "\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027:decrypt/2"
},
{
"name": "\u0027Elixir.Cloak.Ciphers.Deprecated.AES.CTR\u0027:decrypt/2"
}
],
"repo": "https://github.com/danielberkompas/cloak",
"vendor": "danielberkompas",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "0.1.0-pre",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027",
"\u0027Elixir.Cloak.Ciphers.Deprecated.AES.CTR\u0027"
],
"packageName": "danielberkompas/cloak",
"packageURL": "pkg:github/danielberkompas/cloak",
"product": "cloak",
"programFiles": [
"lib/cloak/ciphers/aes_ctr.ex",
"lib/cloak/ciphers/deprecated/aes_ctr.ex"
],
"programRoutines": [
{
"name": "\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027:encrypt/2"
},
{
"name": "\u0027Elixir.Cloak.Ciphers.AES.CTR\u0027:decrypt/2"
},
{
"name": "\u0027Elixir.Cloak.Ciphers.Deprecated.AES.CTR\u0027:decrypt/2"
}
],
"repo": "https://github.com/danielberkompas/cloak",
"vendor": "danielberkompas",
"versions": [
{
"lessThan": "*",
"status": "affected",
"version": "2bd17019e285b55c5c218cc842537bf9280f24c3",
"versionType": "git"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:danielberkompas:cloak:*:*:*:*:*:*:*:*",
"versionStartIncluding": "0.1.0-pre",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Peter Ullrich"
},
{
"lang": "en",
"type": "reporter",
"value": "Peter Ullrich"
},
{
"lang": "en",
"type": "coordinator",
"value": "Jonatan M\u00e4nnchen / EEF"
}
],
"dateAssigned": "2026-10-06T08:37:34.000Z",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eReliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003eCloak.Ciphers.AES.CTR\u003c/code\u003e encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. \u003ccode\u003edecrypt/2\u003c/code\u003e checks only the key tag and the minimum length before it returns the plaintext, and \u003ccode\u003eCloak.Ciphers.Deprecated.AES.CTR\u003c/code\u003e decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.\u003c/p\u003e\n\u003cp\u003eThis issue affects cloak: from 0.1.0-pre onward.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.\n\n`Cloak.Ciphers.AES.CTR` encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. `decrypt/2` checks only the key tag and the minimum length before it returns the plaintext, and `Cloak.Ciphers.Deprecated.AES.CTR` decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.\n\nThis issue affects cloak: from 0.1.0-pre onward."
}
],
"value": "Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking vulnerability in danielberkompas cloak allows an attacker with write access to stored ciphertext to make it decrypt to a chosen value via bit flipping.\n\nCloak.Ciphers.AES.CTR encrypts with AES-256 in CTR mode and stores the key tag, the IV and the ciphertext with no MAC. decrypt/2 checks only the key tag and the minimum length before it returns the plaintext, and Cloak.Ciphers.Deprecated.AES.CTR decrypts the legacy format the same way. CTR is a stream cipher, so a value XORed into the stored ciphertext is XORed into the plaintext at the same offset. An attacker who can write to the encrypted store (for example through SQL injection or a compromised replica) and who knows or can guess a stored plaintext can replace it with any value of the same length. The application receives that value with no error.\n\nThis issue affects cloak: from 0.1.0-pre onward."
}
],
"impacts": [
{
"capecId": "CAPEC-39",
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eAn attacker who can write to the encrypted store can set encrypted fields with known or guessable contents, such as roles, flags, or fixed-format records, to values of their choice without the key. The application decrypts and trusts the forged value.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "An attacker who can write to the encrypted store can set encrypted fields with known or guessable contents, such as roles, flags, or fixed-format records, to values of their choice without the key. The application decrypts and trusts the forged value."
}
],
"value": "An attacker who can write to the encrypted store can set encrypted fields with known or guessable contents, such as roles, flags, or fixed-format records, to values of their choice without the key. The application decrypts and trusts the forged value."
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "HIGH",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-649",
"description": "CWE-649 Reliance on Obfuscation or Encryption of Security-Relevant Inputs without Integrity Checking",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-06T08:37:56.987Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"name": "EEF CNA record for CVE-2026-95105",
"tags": [
"related",
"third-party-advisory"
],
"url": "https://cna.erlef.org/cves/CVE-2026-95105.html"
},
{
"name": "OSV record EEF-CVE-2026-95105",
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-95105"
},
{
"name": "Introducing commit 2bd1701 in danielberkompas/cloak",
"tags": [
"related"
],
"url": "https://github.com/danielberkompas/cloak/commit/2bd17019e285b55c5c218cc842537bf9280f24c3"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Cloak AES-CTR cipher lacks ciphertext authentication, allowing chosen-plaintext forgery by bit flipping",
"workarounds": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eConfigure the vault with \u003ccode\u003eCloak.Ciphers.AES.GCM\u003c/code\u003e as the default cipher and re-encrypt existing values, for example with the \u003ccode\u003ecloak.migrate.ecto\u003c/code\u003e task from cloak_ecto. Then remove \u003ccode\u003eCloak.Ciphers.AES.CTR\u003c/code\u003e and \u003ccode\u003eCloak.Ciphers.Deprecated.AES.CTR\u003c/code\u003e from the vault configuration, so that ciphertext in the CTR format is no longer decrypted. AES-GCM authenticates the ciphertext and rejects modified values.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "Configure the vault with `Cloak.Ciphers.AES.GCM` as the default cipher and re-encrypt existing values, for example with the `cloak.migrate.ecto` task from cloak_ecto. Then remove `Cloak.Ciphers.AES.CTR` and `Cloak.Ciphers.Deprecated.AES.CTR` from the vault configuration, so that ciphertext in the CTR format is no longer decrypted. AES-GCM authenticates the ciphertext and rejects modified values."
}
],
"value": "Configure the vault with Cloak.Ciphers.AES.GCM as the default cipher and re-encrypt existing values, for example with the cloak.migrate.ecto task from cloak_ecto. Then remove Cloak.Ciphers.AES.CTR and Cloak.Ciphers.Deprecated.AES.CTR from the vault configuration, so that ciphertext in the CTR format is no longer decrypted. AES-GCM authenticates the ciphertext and rejects modified values."
}
],
"x_proofOfConcept": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003col\u003e\n\u003cli\u003eEncrypt \u003ccode\u003e\"role=user \"\u003c/code\u003e with \u003ccode\u003eCloak.Ciphers.AES.CTR.encrypt/2\u003c/code\u003e and a random 32-byte key.\u003c/li\u003e\n\u003cli\u003eWithout the key, XOR the last 10 bytes of the result (the ciphertext body) with \u003ccode\u003e:crypto.exor(\"role=user \", \"role=admin\")\u003c/code\u003e. Leave the key tag and the IV unchanged.\u003c/li\u003e\n\u003cli\u003eCall \u003ccode\u003eCloak.Ciphers.AES.CTR.decrypt/2\u003c/code\u003e on the modified value. It returns \u003ccode\u003e{:ok, \"role=admin\"}\u003c/code\u003e.\u003c/li\u003e\n\u003c/ol\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "1. Encrypt `\"role=user \"` with `Cloak.Ciphers.AES.CTR.encrypt/2` and a random 32-byte key.\n2. Without the key, XOR the last 10 bytes of the result (the ciphertext body) with `:crypto.exor(\"role=user \", \"role=admin\")`. Leave the key tag and the IV unchanged.\n3. Call `Cloak.Ciphers.AES.CTR.decrypt/2` on the modified value. It returns `{:ok, \"role=admin\"}`."
}
],
"value": "* Encrypt \"role=user \" with Cloak.Ciphers.AES.CTR.encrypt/2 and a random 32-byte key.\n* Without the key, XOR the last 10 bytes of the result (the ciphertext body) with :crypto.exor(\"role=user \", \"role=admin\"). Leave the key tag and the IV unchanged.\n* Call Cloak.Ciphers.AES.CTR.decrypt/2 on the modified value. It returns {:ok, \"role=admin\"}."
}
]
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-95105",
"datePublished": "2026-10-06T08:37:56.987Z",
"dateReserved": "2026-09-25T07:00:01.880Z",
"dateUpdated": "2026-10-06T11:40:42.775Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}