Common Weakness Enumeration
CWE-203
AllowedObservable Discrepancy
Abstraction: Base · Status: Incomplete
The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.
204 vulnerabilities reference this CWE, most recent first.
CVE-2026-76406 (GCVE-0-2026-76406)
Vulnerability from cvelistv5 – Published: 2026-10-21 22:52 – Updated: 2026-10-28 02:08
VLAI
EPSS
VEX
Title
Information Disclosure through REST API Authentication in Splunk SOAR
Summary
In Splunk SOAR versions below 8.7.0, an unauthenticated user with access to encrypted credential data from an affected Splunk SOAR instance could submit Basic authentication data to the Representational State Transfer (REST) API to expose and decrypt that encrypted credential data.
The vulnerability is possible because Splunk SOAR decrypts encrypted Basic authentication values before completing authentication checks.
The attack requires the unauthenticated user to have encrypted credential data from an affected Splunk SOAR instance. The unauthenticated user should not be able to exploit the vulnerability at will.
For more information see Using the REST API reference for Splunk SOAR (On-premises) (https://help.splunk.com/en/splunk-soar/soar-on-premises/rest-api-reference/8.5.0/using-the-splunk-soar-rest-api/using-the-rest-api-reference-for-splunk-soar-on-premises) in the Splunk documentation.
Severity
5.9 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-28 02:08 UTC
CWE
- CWE-203 - The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.
Assigner
cisco
CNA
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Splunk | Splunk SOAR |
Affected:
0 , < 8.7.0
(custom)
|
Date Public
2026-10-21 00:00
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CVE-2026-73630 (GCVE-0-2026-73630)
Vulnerability from cvelistv5 – Published: 2026-08-14 11:35 – Updated: 2026-08-17 16:08
VLAI
EPSS
VEX
Title
SiYuan before v3.7.4 Information Disclosure via authFilePublishAccess
Summary
SiYuan before v3.7.4 contains an information disclosure vulnerability in the /api/filetree/authFilePublishAccess endpoint, which is registered with CheckAuth only and is reachable anonymously. The endpoint never sets a failure code, so its outcome is signalled entirely by the response message and by the presence of a Set-Cookie header, and these signals differ across access tiers. By submitting requests with an empty password for a candidate document identifier, an anonymous attacker can distinguish whether a document is public/nonexistent, password-protected, or exists at the hidden or forbidden tier, thereby confirming the existence of documents they are not permitted to access. Because hidden and forbidden entries store an empty password, such requests also cause the server to issue a publish-auth cookie for forbidden documents.
Severity
5.8 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-17 15:44 UTC
CWE
- CWE-203 - Observable Discrepancy
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/siyuan-note/siyuan/security/ad… | vendor-advisory |
| https://www.vulncheck.com/advisories/siyuan-befor… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| siyuan-note | siyuan |
Affected:
0 , < 3.7.4
(semver)
Unaffected: 3.7.4 (semver) cpe:2.3:a:b3log:siyuan:*:*:*:*:*:*:*:* |
Date Public
2026-07-31 00:00
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CVE-2026-73409 (GCVE-0-2026-73409)
Vulnerability from cvelistv5 – Published: 2026-08-12 19:19 – Updated: 2026-08-14 22:09
VLAI
EPSS
VEX
Title
Budibase: Server Filesystem Existence/Read Oracle via Builder-Controlled MongoDB tlsCertificateKeyFile
Summary
Budibase is an open-source low-code platform. Prior to 3.40.1, packages/server/src/integrations/mongodb.ts passed builder-controlled tlsCertificateKeyFile and tlsCAFile values directly to MongoClient on Budibase Cloud. A builder could submit absolute server paths through /api/datasources/verify and distinguish readable existing files from missing files by comparing the driver error, exposing a filesystem existence and readability oracle on the shared server. This issue is fixed in version 3.40.1.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-14 22:08 UTC
CWE
- CWE-203 - Observable Discrepancy
Assigner
GitHub_M
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/Budibase/budibase/security/adv… | x_refsource_CONFIRM |
| https://github.com/Budibase/budibase/pull/19244 | x_refsource_MISC |
| https://github.com/Budibase/budibase/commit/e58aa… | x_refsource_MISC |
| https://github.com/Budibase/budibase/releases/tag… | x_refsource_MISC |
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CVE-2026-72699 (GCVE-0-2026-72699)
Vulnerability from cvelistv5 – Published: 2026-08-25 01:30 – Updated: 2026-08-29 11:47
VLAI
EPSS
VEX
Title
Grav Login Plugin before 3.9.1 Email Enumeration via Registration
Summary
The Grav Login plugin (getgrav/grav-plugin-login) before 3.9.1 is vulnerable to email address enumeration. The register() method in classes/Login.php throws a distinct exception (EMAIL_NOT_AVAILABLE) when a submitted email address already belongs to an existing account, while allowing registration to proceed otherwise. Because the registration endpoint has no rate limiting, an attacker can enumerate which email addresses have accounts on the site, one guess per request.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-25 15:26 UTC
CWE
- CWE-203 - Observable Discrepancy
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/getgrav/grav/security/advisori… | vendor-advisory |
| https://www.vulncheck.com/advisories/grav-login-p… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| getgrav | grav-plugin-login |
Affected:
0 , < 3.9.1
(semver)
Unaffected: 3.9.1 (semver) cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:* |
Date Public
2026-08-10 00:00
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CVE-2026-72632 (GCVE-0-2026-72632)
Vulnerability from cvelistv5 – Published: 2026-08-13 19:14 – Updated: 2026-08-13 20:27
VLAI
EPSS
VEX
Title
Observable Discrepancy in Kibana Fleet Leading to Disclosure of Elastic Agent Elasticsearch API Keys
Summary
Observable Discrepancy (CWE-203) in Kibana Fleet can lead to information disclosure via Excavation (CAPEC-116). Fleet removes the Elasticsearch API key value of an enrolled Elastic Agent from the responses of its agent listing capability, but that capability accepted caller-supplied filter expressions over the stored field that holds the value, and evaluated them with Kibana's own internal Elasticsearch privileges rather than the caller's. Because the number of matching agents is reported back to the caller, the difference between a matching and a non-matching filter formed a side channel from which the full API key value could be reconstructed one character at a time with a short sequence of requests.
Severity
7.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 19:29 UTC
CWE
- CWE-203 - Observable Discrepancy
Assigner
elastic
CNA
References
1 reference
Impacted products
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CVE-2026-67193 (GCVE-0-2026-67193)
Vulnerability from cvelistv5 – Published: 2026-07-29 15:51 – Updated: 2026-08-14 16:50
VLAI
EPSS
VEX
Title
Xlight FTP Server < 3.9.5 Information Disclosure via USER Command
Summary
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Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-29 17:53 UTC
CWE
- CWE-203 - Observable Discrepancy
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://www.xlightftpd.com/whatsnew.htm | release-notes |
| https://www.vulncheck.com/advisories/xlight-ftp-s… | third-party-advisory |
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1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Xlight | Xlight FTP Server |
Affected:
0 , < 3.9.5
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Date Public
2026-07-01 00:00
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CVE-2026-65626 (GCVE-0-2026-65626)
Vulnerability from cvelistv5 – Published: 2026-10-26 19:53 – Updated: 2026-11-02 19:43
VLAI
EPSS
VEX
Title
Bleichenbacher padding oracle in RSAES-PKCS1-v1_5 decryption in jose
Summary
The pure-Erlang RSAES-PKCS1-v1_5 decryption in the jose_jwa_pkcs1 module is a Bleichenbacher padding oracle. eme_pkcs1_decode/2 returns the recovered message when a decrypted block has valid PKCS#1 v1.5 padding (a leading 0x00 0x02, a padding string of at least eight non-zero bytes, and a 0x00 separator) and returns a distinct error result otherwise, and rsaes_pkcs1_decrypt/2 additionally returns {error, {badsize, _}} when the length check fails. The implementation applies no implicit-rejection countermeasure (RFC 8017 §7.2.2): it does not substitute a deterministic pseudo-random plaintext on a padding failure, so a one-bit padding-conformance signal leaks to the caller. Because the underlying modular exponentiation in dp/2 is a raw, non-blinded crypto:mod_pow/3, the padding check also stays distinguishable by timing even when an application normalizes every failure to a single error value.
An unauthenticated attacker who knows only the public RSA key and can submit ciphertexts to a decryption endpoint that unwraps RSA1_5 JWE keys (or otherwise calls decrypt_private/3 with rsa_pkcs1_padding) can use this oracle to recover the plaintext of intercepted ciphertexts, such as content-encryption keys and thus the protected message, or to forge signatures, through roughly 10^4 to 10^6 adaptive chosen-ciphertext queries.
This issue affects jose: from 1.3.0 before 1.11.13.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-02 18:37 UTC
CWE
- CWE-203 - Observable Discrepancy
Assigner
EEF
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/potatosalad/erlang-jose/securi… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-65626.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-65626 | related |
| https://github.com/potatosalad/erlang-jose/commit… | related |
| https://github.com/potatosalad/erlang-jose/commit… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| potatosalad | jose |
Affected:
1.3.0 , < 1.11.13
(semver)
cpe:2.3:a:potatosalad:jose:*:*:*:*:*:*:*:* |
|
| potatosalad | jose |
Affected:
853c5d4c4c0bd2a7ecb055b237f4284184e176c8 , < 0eac8cef9aaa48fb6846f4e47a0002dc4a73966d
(git)
cpe:2.3:a:potatosalad:jose:*:*:*:*:*:*:*:* |
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CVE-2026-65314 (GCVE-0-2026-65314)
Vulnerability from cvelistv5 – Published: 2026-07-21 21:05 – Updated: 2026-11-08 14:08
VLAI
EPSS
VEX
Title
Electric Postgres Sync Excluded-Column Value Inference via Subset Where Clauses
Summary
Electric Postgres Sync versions below 1.6.10 contains an information disclosure vulnerability that allows attackers to infer the values of excluded columns by crafting subset where clause conditions against shape responses. Attackers can observe whether subset where conditions match rows to deduce sensitive field data even though those columns are not returned in shape responses, bypassing column-based access restrictions.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 15:34 UTC
CWE
- CWE-203 - Observable Discrepancy
Assigner
VulnCheck
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/electric-sql/electric/security… | vendor-advisory |
| https://github.com/electric-sql/electric | patch |
| https://www.vulncheck.com/advisories/electric-pos… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ElectricSQL | Electric Postgres Sync |
Affected:
0 , ≤ 1.6.10
(semver)
|
Date Public
2026-07-21 00:00
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CVE-2026-64822 (GCVE-0-2026-64822)
Vulnerability from cvelistv5 – Published: 2026-07-21 20:28 – Updated: 2026-11-08 14:07 X_Open Source
VLAI
EPSS
VEX
Title
djangoSIGE 1.10 User Enumeration via ForgotPasswordView
Summary
djangoSIGE through 1.10 (commit a6fe7e8) contains a user enumeration vulnerability in ForgotPasswordView within djangosige/apps/login/views.py that allows unauthenticated attackers to identify valid accounts by observing distinct error messages returned by the password reset endpoint. Attackers can submit arbitrary usernames or email addresses to the POST login/esqueceu/ endpoint and distinguish between existing and non-existing accounts based on observable discrepancies in the application's responses.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-22 14:29 UTC
CWE
- CWE-203 - Observable Discrepancy
Assigner
VulnCheck
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/americooo/pentest-writeups/tre… | technical-descriptionexploit |
| https://github.com/thiagopena/djangoSIGE/pull/163 | issue-trackingpatch |
| https://www.vulncheck.com/advisories/djangosige-u… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| thiagopena | djangoSIGE |
Affected:
0 , ≤ 1.10
(custom)
Affected: 0 , ≤ a6fe7e8e3a7d52ba0a25305df4e5e7e0cd5f5792 (git) |
Date Public
2026-07-21 00:00
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CVE-2026-63573 (GCVE-0-2026-63573)
Vulnerability from cvelistv5 – Published: 2026-10-02 07:05 – Updated: 2026-10-02 19:20
VLAI
EPSS
VEX
Title
Bleichenbacher padding oracle in CMS RSA PKCS#1 v1.5 key-transport unwrap
Summary
Observable discrepancy in the CMS RSA PKCS#1 v1.5 key-transport unwrap (KeyTransRecipientInformation.UnwrapKey) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who holds a captured CMS EnvelopedData message, and who can submit many modified messages to an application that decrypts them with the recipient's RSA private key and reveals how decryption failed, to recover the captured message's content-encryption key and so its content, via a Bleichenbacher-style adaptive chosen-ciphertext attack, because a key-transport ciphertext with invalid PKCS#1 v1.5 padding is rejected during unwrap with a distinct "bad padding in message." CmsException instead of being replaced by a random key, so it can be told apart from a correctly padded ciphertext, which fails only later at content decryption.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 19:19 UTC
CWE
- CWE-203 - Observable Discrepancy
Assigner
bcorg
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/bcgit/bc-csharp/wiki/CVE-2026-63573 | vendor-advisory |
| https://github.com/bcgit/bc-csharp/commit/85679cc… | patch |
| https://github.com/bcgit/bc-csharp/commit/c38b479… | patch |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Legion of the Bouncy Castle Inc. | bc-csharp |
Affected:
0 , < 2.7.0
(semver)
|
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
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"cna": {
"affected": [
{
"collectionURL": "https://www.nuget.org/packages/BouncyCastle.Cryptography",
"defaultStatus": "unaffected",
"packageName": "BouncyCastle.Cryptography",
"product": "bc-csharp",
"programFiles": [
"crypto/src/cms/KeyTransRecipientInformation.cs"
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"repo": "https://github.com/bcgit/bc-csharp",
"vendor": "Legion of the Bouncy Castle Inc.",
"versions": [
{
"lessThan": "2.7.0",
"status": "affected",
"version": "0",
"versionType": "semver"
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"value": "Discovered by Claude, Anthropic\u0027s AI assistant, and triaged by the Anthropic security team in collaboration with Anthropic Research."
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"base64": false,
"type": "text/html",
"value": "Observable discrepancy in the CMS RSA PKCS#1 v1.5 key-transport unwrap (KeyTransRecipientInformation.UnwrapKey) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who holds a captured CMS EnvelopedData message, and who can submit many modified messages to an application that decrypts them with the recipient\u0027s RSA private key and reveals how decryption failed, to recover the captured message\u0027s content-encryption key and so its content, via a Bleichenbacher-style adaptive chosen-ciphertext attack, because a key-transport ciphertext with invalid PKCS#1 v1.5 padding is rejected during unwrap with a distinct \"bad padding in message.\" CmsException instead of being replaced by a random key, so it can be told apart from a correctly padded ciphertext, which fails only later at content decryption."
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"value": "Observable discrepancy in the CMS RSA PKCS#1 v1.5 key-transport unwrap (KeyTransRecipientInformation.UnwrapKey) in Legion of the Bouncy Castle Inc. bc-csharp before 2.7.0 allows a remote attacker who holds a captured CMS EnvelopedData message, and who can submit many modified messages to an application that decrypts them with the recipient\u0027s RSA private key and reveals how decryption failed, to recover the captured message\u0027s content-encryption key and so its content, via a Bleichenbacher-style adaptive chosen-ciphertext attack, because a key-transport ciphertext with invalid PKCS#1 v1.5 padding is rejected during unwrap with a distinct \"bad padding in message.\" CmsException instead of being replaced by a random key, so it can be told apart from a correctly padded ciphertext, which fails only later at content decryption."
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"impacts": [
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"lang": "en",
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"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "PRESENT",
"attackVector": "NETWORK",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"exploitMaturity": "NOT_DEFINED",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
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"userInteraction": "NONE",
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"version": "4.0",
"vulnAvailabilityImpact": "NONE",
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"vulnIntegrityImpact": "NONE",
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"tags": [
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"url": "https://github.com/bcgit/bc-csharp/wiki/CVE-2026-63573"
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"url": "https://github.com/bcgit/bc-csharp/commit/85679cc7023adf4e2a0650b88a1f4f98679c7463"
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"url": "https://github.com/bcgit/bc-csharp/commit/c38b4790e2aef68f116a551f73b94ea05cb5590c"
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"source": {
"discovery": "EXTERNAL"
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"title": "Bleichenbacher padding oracle in CMS RSA PKCS#1 v1.5 key-transport unwrap",
"x_antReportIds": [
"ANT-2026-5DGM87SF"
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"dateReserved": "2026-07-16T23:50:45.118Z",
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Mitigation MIT-46
Architecture and Design
Strategy: Separation of Privilege
- Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
- Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
Mitigation MIT-39
Implementation
- Ensure that error messages only contain minimal details that are useful to the intended audience and no one else. The messages need to strike the balance between being too cryptic (which can confuse users) or being too detailed (which may reveal more than intended). The messages should not reveal the methods that were used to determine the error. Attackers can use detailed information to refine or optimize their original attack, thereby increasing their chances of success.
- If errors must be captured in some detail, record them in log messages, but consider what could occur if the log messages can be viewed by attackers. Highly sensitive information such as passwords should never be saved to log files.
- Avoid inconsistent messaging that might accidentally tip off an attacker about internal state, such as whether a user account exists or not.
CAPEC-189: Black Box Reverse Engineering
An adversary discovers the structure, function, and composition of a type of computer software through black box analysis techniques. 'Black Box' methods involve interacting with the software indirectly, in the absence of direct access to the executable object. Such analysis typically involves interacting with the software at the boundaries of where the software interfaces with a larger execution environment, such as input-output vectors, libraries, or APIs. Black Box Reverse Engineering also refers to gathering physical side effects of a hardware device, such as electromagnetic radiation or sounds.