Common Weakness Enumeration
CWE-347
AllowedImproper Verification of Cryptographic Signature
Abstraction: Base · Status: Draft
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
689 vulnerabilities reference this CWE, most recent first.
CVE-2026-44748 (GCVE-0-2026-44748)
Vulnerability from cvelistv5 – Published: 2026-06-09 00:20 – Updated: 2026-06-09 13:03
VLAI
EPSS
VEX
Title
XML Signature Wrapping in SAML Authentication in SAP NetWeaver AS ABAP and ABAP Platform
Summary
SAP NetWeaver Application Server ABAP and ABAP Platform allows an authenticated attacker with normal privileges to obtain a valid signed message and send modified signed XML documents to the verifier. This may result in acceptance of tampered identity information leading to unauthorized access to sensitive user data and potential disruption of normal system usage. This causes a high impact on confidentiality, integrity and availability of the application.
Severity
9.9 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-09 03:56 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
sap
CNA
References
2 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SAP_SE | SAP NetWeaver AS ABAP and ABAP Platform |
Affected:
SAP_BASIS 702
Affected: SAP_BASIS 731 Affected: SAP_BASIS 740 Affected: SAP_BASIS 750 Affected: SAP_BASIS 751 Affected: SAP_BASIS 752 Affected: SAP_BASIS 753 Affected: SAP_BASIS 754 Affected: SAP_BASIS 755 Affected: SAP_BASIS 756 Affected: SAP_BASIS 757 Affected: SAP_BASIS 758 Affected: SAP_BASIS 816 Affected: SAP_BASIS 918 Affected: SAP_BASIS 919 |
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CVE-2026-44720 (GCVE-0-2026-44720)
Vulnerability from cvelistv5 – Published: 2026-05-27 21:02 – Updated: 2026-06-02 18:09
VLAI
EPSS
VEX
Title
OpenLearnX: Critical Authentication Bypass via JWT Signature Verification Disabled Leading to Account Takeover
Summary
OpenLearnX is an open-source, decentralized learning and assessment platform. Prior to 2.0.4, a critical authentication vulnerability was identified in OpenLearnX that could allow unauthorized access to user accounts under specific conditions. This vulnerability is fixed in 2.0.4.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 18:08 UTC
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/th30d4y/OpenLearnX/security/ad… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| th30d4y | OpenLearnX |
Affected:
< 2.0.4
|
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CVE-2026-44714 (GCVE-0-2026-44714)
Vulnerability from cvelistv5 – Published: 2026-05-15 16:51 – Updated: 2026-05-16 01:13
VLAI
EPSS
VEX
Title
bitcoinj: ScriptExecution P2PKH/P2WPKH Verification Bypass
Summary
The bitcoinj library is a Java implementation of the Bitcoin protocol. Prior to 0.17.1, ScriptExecution.correctlySpends() contains two fast-path verification bugs for standard P2PKH and native P2WPKH spends in core/src/main/java/org/bitcoinj/script/ScriptExecution.java. In both branches, bitcoinj verifies an attacker-controlled signature/public-key pair but fails to verify that the public key is the one committed to by the output being spent. As a result, any attacker keypair can satisfy bitcoinj's local verification for arbitrary P2PKH and P2WPKH outputs. This vulnerability is fixed in 0.17.1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-16 01:13 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
GitHub_M
CNA
References
3 references
| URL | Tags |
|---|---|
| https://github.com/bitcoinj/bitcoinj/security/adv… | x_refsource_CONFIRM |
| https://github.com/bitcoinj/bitcoinj/commit/2bc56… | x_refsource_MISC |
| https://github.com/bitcoinj/bitcoinj/commit/b575a… | x_refsource_MISC |
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CVE-2026-44699 (GCVE-0-2026-44699)
Vulnerability from cvelistv5 – Published: 2026-05-15 16:08 – Updated: 2026-05-15 18:04
VLAI
EPSS
VEX
Title
LibJWT: Algorithm confusion allows JWT forgery with RSA JWK as empty-key HMAC
Summary
LibJWT is a C JSON Web Token Library. From 3.0.0 to 3.3.2, libjwt accepts an RSA JWK that does not contain an alg parameter as the verification key for an HS256/HS384/HS512 token. In the OpenSSL backend, this causes HMAC verification to run with a zero-length key, so an attacker can forge a valid JWT without knowing any secret or RSA private key. This is an algorithm-confusion authentication bypass. It affects applications that load RSA keys from JWKS where alg is omitted, which is valid JWK syntax and common in real deployments, and then choose the verification algorithm from the JWT header, for example in a kid lookup callback. This vulnerability is fixed in 3.3.3.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-15 18:00 UTC
CWE
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/benmcollins/libjwt/security/ad… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| benmcollins | libjwt |
Affected:
>= 3.0.0, < 3.3.3
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CVE-2026-44497 (GCVE-0-2026-44497)
Vulnerability from cvelistv5 – Published: 2026-05-08 15:08 – Updated: 2026-05-08 15:48
VLAI
EPSS
VEX
Title
ZEBRA: Consensus Divergence in Transparent Sighash Hash-Type Handling due to Stale Buffer
Summary
ZEBRA is a Zcash node written entirely in Rust. Prior to zebrad version 4.4.0 and prior to zebra-script version 6.0.0, the fix for CVE-2026-41583 introduced a separate issue due to insufficient error handling of the case where the sighash type is invalid, during sighash computation. Instead of returning an error, the normal flow would resume, and the input sighash buffer would be left untouched. In scenarios where a previous signature validation could leave a valid sighash in the buffer, an invalid hash-type could be incorrectly accepted, which would create a consensus split between Zebra and zcashd nodes. This issue has been patched in zebrad version 4.4.0 and zebra-script version 6.0.0.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-08 15:47 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/ZcashFoundation/zebra/security… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ZcashFoundation | zebra |
Affected:
zebra-script < 6.0.0
Affected: zebrad < 4.4.0 |
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CVE-2026-44309 (GCVE-0-2026-44309)
Vulnerability from cvelistv5 – Published: 2026-05-15 16:22 – Updated: 2026-05-15 17:43
VLAI
EPSS
VEX
Title
gitsign verify accepts signatures over go-git-normalized bytes, enabling trust confusion on malformed commits
Summary
Gitsign is a keyless Sigstore to signing tool for Git commits with your a GitHub / OIDC identity. Prior to 0.16.0, gitsign verify and gitsign verify-tag re-encode commit/tag objects through go-git's EncodeWithoutSignature before checking the signature, instead of verifying against the raw git object bytes. For malformed objects with duplicate tree headers, git-core and go-git parse different trees: git-core uses the first, go-git uses the second. A signature crafted over the go-git-normalized form (second tree) passes gitsign verify while git-core resolves the commit to a completely different tree. This breaks the invariant that a verified signature, the commit semantics git-core presents to users, and the object hash logged in Rekor all refer to the same content. This vulnerability is fixed in 0.16.0.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-15 17:43 UTC
CWE
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/sigstore/gitsign/security/advi… | x_refsource_CONFIRM |
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CVE-2026-44104 (GCVE-0-2026-44104)
Vulnerability from cvelistv5 – Published: 2026-07-30 06:52 – Updated: 2026-07-30 14:05
VLAI
EPSS
VEX
Title
ControllerAgent does not perform validation of firmware
Summary
The firmware update process for the basemodule of the charging controller only validates the
CRC32 checksum without cryptographic signature verification. This allows an unauthenticated remote attacker to install a modified firmware, resulting in full system compromise.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-30 14:05 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
CERTVDE
CNA
References
1 reference
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Phoenix Contact | CHARX SEC-3150 |
Affected:
1.0.0 , < 1.9.1
(semver)
|
|
| Phoenix Contact | CHARX SEC-3100 |
Affected:
1.0.0 , < 1.9.1
(semver)
|
|
| Phoenix Contact | CHARX SEC-3050 |
Affected:
1.0.0 , < 1.9.1
(semver)
|
|
| Phoenix Contact | CHARX SEC-3000 |
Affected:
1.0.0 , < 1.9.1
(semver)
|
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CVE-2026-42784 (GCVE-0-2026-42784)
Vulnerability from cvelistv5 – Published: 2026-09-16 16:56 – Updated: 2026-11-04 22:20
VLAI
EPSS
VEX
Title
Sequoia-openpgp: sequoia-openpgp: cryptographic integrity compromise via key flag confusion
Summary
A flaw was found in sequoia-openpgp. The library incorrectly infers key flags for older certificates when a key flags subpacket is missing, leading to a discrepancy in how key capabilities are viewed. This key flag confusion allows an attacker to bypass the back-signature check. Consequently, an attacker can illegitimately bind an arbitrary subkey to their own certificate and forge signatures, completely compromising cryptographic integrity.
Severity
7.4 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 18:12 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
redhat
CNA
References
11 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2026:34160 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:42078 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:42902 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:76733 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:76734 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:76735 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:76737 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:79357 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:94791 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2026-42784 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2464122 | issue-trackingx_refsource_REDHAT |
Impacted products
16 products
| Vendor | Product | Version | |
|---|---|---|---|
| Red Hat | Red Hat Ansible Automation Platform 2.6 for RHEL 9 |
Unaffected:
0:0.1.34-1.el9ap , < *
(rpm)
cpe:/a:redhat:ansible_automation_platform:2.6::el9 cpe:/a:redhat:ansible_automation_platform_developer:2.6::el9 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:1.10.2.1-1.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:1.3.0.2-1.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
0:1.4.0.1-2.el10_2 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:1.10.2.1-1.el9_8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::crb cpe:/o:redhat:enterprise_linux:9::baseos |
|
| Red Hat | Red Hat Cost Management On-Premise 1 |
Unaffected:
1791460851 , < *
(rpm)
cpe:/a:redhat:cost_management_on_premise:1::el10 |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
0.3.2-4.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Red Hat Hardened Images |
Unaffected:
1.10.3-0.3.hum1 , < *
(rpm)
cpe:/a:redhat:hummingbird:1 |
|
| Red Hat | Confidential Compute Attestation |
cpe:/a:redhat:confidential_compute_attestation:1
|
|
| Red Hat | Red Hat Ansible Automation Platform 2 |
cpe:/a:redhat:ansible_automation_platform:2
|
|
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/a:redhat:enterprise_linux:10
|
|
| Red Hat | Red Hat Enterprise Linux 9 |
cpe:/a:redhat:enterprise_linux:9
|
|
| Red Hat | Red Hat OpenShift Container Platform 4 |
cpe:/a:redhat:openshift:4
|
|
| Red Hat | Red Hat Satellite 6 |
cpe:/a:redhat:satellite:6
|
|
| Red Hat | Red Hat Trusted Profile Analyzer |
cpe:/a:redhat:trusted_profile_analyzer:2
|
|
| Red Hat | Red Hat Trusted Profile Analyzer |
cpe:/a:redhat:trusted_profile_analyzer:3
|
Date Public
2026-09-16 00:00
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CVE-2026-42743 (GCVE-0-2026-42743)
Vulnerability from cvelistv5 – Published: 2026-06-15 20:18 – Updated: 2026-06-16 01:23
VLAI
EPSS
VEX
Title
WordPress Masteriyo - LMS plugin <= 2.1.8 - Broken Authentication vulnerability
Summary
Unauthenticated Broken Authentication in Masteriyo - LMS <= 2.1.8 versions.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 01:09 UTC
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
Patchstack
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ThemeGrill | Masteriyo - LMS |
Affected:
n/a , ≤ 2.1.8
(custom)
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CVE-2026-42602 (GCVE-0-2026-42602)
Vulnerability from cvelistv5 – Published: 2026-05-13 20:12 – Updated: 2026-05-14 12:52
VLAI
EPSS
VEX
Title
azureauthextension Authenticate method does not validate bearer tokens, allowing auth bypass via replay
Summary
azureauthextension is the Azure Authenticator Extension. From 0.124.0 to 0.150.0, a server-side authentication bypass in azureauthextension allows any party who holds a single valid Azure access token for any scope the collector's configured identity can mint for to authenticate to any OpenTelemetry receiver that uses auth: azure_auth. The extension's Authenticate method does not validate incoming bearer tokens as JWTs. Instead, it calls its own configured credential to obtain an access token and compares the client's token to the result with string equality — and the scope for that server-side token request is taken from the client-supplied Host header. As a result, a token minted for any Azure resource the service principal has ever been issued a token for (ARM, Graph, Key Vault, Storage, etc.) will authenticate to the collector if the attacker picks a matching Host. Tokens are replayable for the full issued lifetime (commonly several hours for managed identity tokens).
Severity
8.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-14 12:51 UTC
CWE
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-c… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-collector-contrib |
Affected:
>= 0.124.0, <= 0.150.0
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"version": "\u003e= 0.124.0, \u003c= 0.150.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "azureauthextension is the Azure Authenticator Extension. From 0.124.0 to 0.150.0, a server-side authentication bypass in azureauthextension allows any party who holds a single valid Azure access token for any scope the collector\u0027s configured identity can mint for to authenticate to any OpenTelemetry receiver that uses auth: azure_auth. The extension\u0027s Authenticate method does not validate incoming bearer tokens as JWTs. Instead, it calls its own configured credential to obtain an access token and compares the client\u0027s token to the result with string equality \u2014 and the scope for that server-side token request is taken from the client-supplied Host header. As a result, a token minted for any Azure resource the service principal has ever been issued a token for (ARM, Graph, Key Vault, Storage, etc.) will authenticate to the collector if the attacker picks a matching Host. Tokens are replayable for the full issued lifetime (commonly several hours for managed identity tokens)."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-208",
"description": "CWE-208: Observable Timing Discrepancy",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-287",
"description": "CWE-287: Improper Authentication",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-290",
"description": "CWE-290: Authentication Bypass by Spoofing",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-294",
"description": "CWE-294: Authentication Bypass by Capture-replay",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-347",
"description": "CWE-347: Improper Verification of Cryptographic Signature",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-13T20:12:18.936Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/open-telemetry/opentelemetry-collector-contrib/security/advisories/GHSA-pjv4-3c63-699f",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/open-telemetry/opentelemetry-collector-contrib/security/advisories/GHSA-pjv4-3c63-699f"
}
],
"source": {
"advisory": "GHSA-pjv4-3c63-699f",
"discovery": "UNKNOWN"
},
"title": "azureauthextension Authenticate method does not validate bearer tokens, allowing auth bypass via replay"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-42602",
"datePublished": "2026-05-13T20:12:18.936Z",
"dateReserved": "2026-04-29T00:31:15.725Z",
"dateUpdated": "2026-05-14T12:52:53.551Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
No mitigation information available for this CWE.
CAPEC-463: Padding Oracle Crypto Attack
An adversary is able to efficiently decrypt data without knowing the decryption key if a target system leaks data on whether or not a padding error happened while decrypting the ciphertext. A target system that leaks this type of information becomes the padding oracle and an adversary is able to make use of that oracle to efficiently decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). In addition to performing decryption, an adversary is also able to produce valid ciphertexts (i.e., perform encryption) by using the padding oracle, all without knowing the encryption key.
CAPEC-475: Signature Spoofing by Improper Validation
An adversary exploits a cryptographic weakness in the signature verification algorithm implementation to generate a valid signature without knowing the key.