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Common Weakness Enumeration

CWE-347

Allowed

Improper Verification of Cryptographic Signature

Abstraction: Base · Status: Draft

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

1336 vulnerabilities reference this CWE, most recent first.

CVE-2026-33487 (GCVE-0-2026-33487)

Vulnerability from cvelistv5 – Published: 2026-03-26 17:17 – Updated: 2026-09-09 12:05
VLAI
Title
goxmldsig has validateSignature Loop Variable Capture Signature Bypass
Summary
goxmlsig provides XML Digital Signatures implemented in Go. Prior to version 1.6.0, the `validateSignature` function in `validate.go` goes through the references in the `SignedInfo` block to find one that matches the signed element's ID. In Go versions before 1.22, or when `go.mod` uses an older version, there is a loop variable capture issue. The code takes the address of the loop variable `_ref` instead of its value. As a result, if more than one reference matches the ID or if the loop logic is incorrect, the `ref` pointer will always end up pointing to the last element in the `SignedInfo.References` slice after the loop. goxmlsig version 1.6.0 contains a patch.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-30 11:16 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
  • CWE-682 - Incorrect Calculation
References
Impacted products
Vendor Product Version
russellhaering goxmldsig Affected: < 1.6.0
Create a notification for this product.
Red Hat Multicluster Global Hub 1.3.4 Unaffected: 1779212259 , < * (rpm)
    cpe:/a:redhat:multicluster_globalhub:1.3::el9
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Red Hat Multicluster Global Hub 1.4.5 Unaffected: 1779579439 , < * (rpm)
    cpe:/a:redhat:multicluster_globalhub:1.4::el9
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Red Hat Multicluster Global Hub 1.6.5 Unaffected: 1780167118 , < * (rpm)
    cpe:/a:redhat:multicluster_globalhub:1.6::el9
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Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.14 Unaffected: 1782693386 , < * (rpm)
    cpe:/a:redhat:acm:2.14::el9
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Red Hat Red Hat Advanced Cluster Management for Kubernetes 2.15 Unaffected: 1777142269 , < * (rpm)
    cpe:/a:redhat:acm:2.15::el9
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Red Hat Red Hat multicluster global hub 1.5.3 Unaffected: 1778867753 , < * (rpm)
    cpe:/a:redhat:multicluster_globalhub:1.5::el9
Create a notification for this product.
Red Hat Red Hat OpenShift GitOps 1.18 Unaffected: 1779116359 , < * (rpm)
    cpe:/a:redhat:openshift_gitops:1.18::el8
Create a notification for this product.
Red Hat Red Hat OpenShift GitOps 1.19 Unaffected: 1779209965 , < * (rpm)
    cpe:/a:redhat:openshift_gitops:1.19::el8
Create a notification for this product.
Red Hat Red Hat Advanced Cluster Security 4     cpe:/a:redhat:advanced_cluster_security:4
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Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
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Red Hat Red Hat Enterprise Linux 8     cpe:/o:redhat:enterprise_linux:8
Create a notification for this product.
Red Hat Red Hat Enterprise Linux 9     cpe:/o:redhat:enterprise_linux:9
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Show details on NVD website

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CVE-2026-33467 (GCVE-0-2026-33467)

Vulnerability from cvelistv5 – Published: 2026-04-28 21:15 – Updated: 2026-04-29 15:10
VLAI
Title
Improper Verification of Cryptographic Signature in Elastic Package Registry Leading to Package Integrity Bypass
Summary
Improper Verification of Cryptographic Signature (CWE-347) in Elastic Package Registry could allow an attacker positioned to intercept network traffic, or to otherwise influence the contents served to a self-hosted registry, to substitute a tampered package without the integrity check failing closed.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-29 14:54 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Impacted products
Vendor Product Version
Elastic Elastic Package Registry Affected: 0.1.0 , ≤ 1.37.0 (semver)
Create a notification for this product.
Show details on NVD website

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CVE-2026-33117 (GCVE-0-2026-33117)

Vulnerability from cvelistv5 – Published: 2026-05-12 16:58 – Updated: 2026-08-10 15:12
VLAI
Title
Azure SDK for Java Security Feature Bypass Vulnerability
Summary
The Java Key Vault Keys library in the Azure SDK for Java contains an issue in the local cryptographic verification path where authentication tag comparison was implemented incorrectly. In affected applications that use the vulnerable local cryptography path, specially crafted encrypted input may bypass integrity verification checks. Operations delegated to the Key Vault service are not affected. The issue is addressed in version 4.10.6.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-13 03:57 UTC
CWE
  • CWE-287 - Improper Authentication
  • CWE-347 - Improper Verification of Cryptographic Signature
References
Impacted products
Vendor Product Version
Microsoft Azure SDK for Java Affected: 1.0.0 , < 4.10.6 (custom)
    cpe:2.3:a:microsoft:azure_sdk_for_java:*:*:*:*:*:*:*:*
Create a notification for this product.
Date Public
2026-05-12 14:00
Show details on NVD website

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CVE-2026-33026 (GCVE-0-2026-33026)

Vulnerability from cvelistv5 – Published: 2026-03-30 19:26 – Updated: 2026-03-31 14:17
VLAI
Title
nginx-ui Backup Restore Allows Tampering with Encrypted Backups
Summary
Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, the nginx-ui backup restore mechanism allows attackers to tamper with encrypted backup archives and inject malicious configuration during restoration. This issue has been patched in version 2.3.4.
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-31 14:17 UTC
CWE
  • CWE-312 - Cleartext Storage of Sensitive Information
  • CWE-347 - Improper Verification of Cryptographic Signature
  • CWE-354 - Improper Validation of Integrity Check Value
References
Impacted products
Vendor Product Version
0xJacky nginx-ui Affected: < 2.3.4
Create a notification for this product.
Show details on NVD website

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CVE-2026-32974 (GCVE-0-2026-32974)

Vulnerability from cvelistv5 – Published: 2026-03-29 12:44 – Updated: 2026-06-23 16:15
VLAI
Title
OpenClaw < 2026.3.12 - Forged Event Injection via Feishu Webhook Verification Token
Summary
OpenClaw before 2026.3.12 contains an authentication bypass vulnerability in Feishu webhook mode when only verificationToken is configured without encryptKey, allowing acceptance of forged events. Unauthenticated network attackers can inject forged Feishu events and trigger downstream tool execution by reaching the webhook endpoint.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-01 15:32 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
References
Impacted products
Vendor Product Version
OpenClaw OpenClaw Affected: 0 , < 2026.3.12 (semver)
Unaffected: 2026.3.12 (semver)
    cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:node.js:*:*
Create a notification for this product.
Date Public
2026-03-13 00:00
Show details on NVD website

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CVE-2026-32883 (GCVE-0-2026-32883)

Vulnerability from cvelistv5 – Published: 2026-03-30 20:36 – Updated: 2026-04-02 14:10
VLAI
Title
Botan: Missing OCSP Response Signature Verification Allows MitM Certificate Revocation Bypass
Summary
Botan is a C++ cryptography library. From version 3.0.0 to before version 3.11.0, during X509 path validation, OCSP responses were checked for an appropriate status code, but critically omitted verifying the signature of the OCSP response itself. This issue has been patched in version 3.11.0.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-02 14:09 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
References
Impacted products
Vendor Product Version
randombit botan Affected: >= 3.0.0, < 3.11.0
Create a notification for this product.
Show details on NVD website

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CVE-2026-32614 (GCVE-0-2026-32614)

Vulnerability from cvelistv5 – Published: 2026-03-13 20:14 – Updated: 2026-03-16 20:12
VLAI
Title
Go ShangMi SM9 Infinity-Point Ciphertext Forgery Vulnerability
Summary
Go ShangMi (Commercial Cryptography) Library (GMSM) is a cryptographic library that covers the Chinese commercial cryptographic public algorithms SM2/SM3/SM4/SM9/ZUC. Prior to 0.41.1, the current SM9 decryption implementation contains an infinity-point ciphertext forgery vulnerability. The root cause is that, during decryption, the elliptic-curve point C1 in the ciphertext is only deserialized and checked to be on the curve, but the implementation does not explicitly reject the point at infinity. In the current implementation, an attacker can construct C1 as the point at infinity, causing the bilinear pairing result to degenerate into the identity element in the GT group. As a result, a critical part of the key derivation input becomes a predictable constant. An attacker who only knows the target user's UID can derive the decryption key material and then forge a ciphertext that passes the integrity check. This vulnerability is fixed in 0.41.1.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-16 20:11 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
References
Impacted products
Vendor Product Version
emmansun gmsm Affected: < 0.41.1
Create a notification for this product.
Show details on NVD website

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CVE-2026-32294 (GCVE-0-2026-32294)

Vulnerability from cvelistv5 – Published: 2026-03-17 17:19 – Updated: 2026-03-17 18:12
VLAI
Title
JetKVM insufficient firmware verification
Summary
JetKVM prior to 0.5.4 does not verify the authenticity of downloaded firmware files. An attacker-in-the-middle or a compromised update server could modify the firmware and the corresponding SHA256 hash to pass verification.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · cisa-cg (v2.0.3)
Decision recorded 2026-03-11 17:25 UTC
CWE
  • CWE-345 - Insufficient Verification of Data Authenticity
  • CWE-347 - Improper Verification of Cryptographic Signature
Impacted products
Vendor Product Version
JetKVM JetKVM Affected: 0 , < 0.5.4 (custom)
Unaffected: 0.5.4
Create a notification for this product.
Date Public
2026-03-17 00:00
Show details on NVD website

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CVE-2026-31946 (GCVE-0-2026-31946)

Vulnerability from cvelistv5 – Published: 2026-03-30 20:31 – Updated: 2026-03-31 14:08
VLAI
Title
OpenOLAT: Authentication bypass via forged JWT in OIDC implicit flow
Summary
OpenOlat is an open source web-based e-learning platform for teaching, learning, assessment and communication. From version 10.5.4 to before version 20.2.5, OpenOLAT's OpenID Connect implicit flow implementation does not verify JWT signatures. The JSONWebToken.parse() method silently discards the signature segment of the compact JWT (header.payload.signature), and the getAccessToken() methods in both OpenIdConnectApi and OpenIdConnectFullConfigurableApi only validate claim-level fields (issuer, audience, state, nonce) without any cryptographic signature verification against the Identity Provider's JWKS endpoint. This issue has been patched in version 20.2.5.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-31 14:07 UTC
CWE
  • CWE-287 - Improper Authentication
  • CWE-347 - Improper Verification of Cryptographic Signature
References
Impacted products
Vendor Product Version
OpenOLAT OpenOLAT Affected: >= 10.5.4, < 20.2.5
Create a notification for this product.
Show details on NVD website

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CVE-2026-29000 (GCVE-0-2026-29000)

Vulnerability from cvelistv5 – Published: 2026-03-04 21:49 – Updated: 2026-07-14 18:39
VLAI
Title
pac4j-jwt JwtAuthenticator Authentication Bypass
Summary
pac4j-jwt versions prior to 4.5.9, 5.7.9, and 6.3.3 contain an authentication bypass vulnerability in JwtAuthenticator when processing encrypted JWTs that allows remote attackers to forge authentication tokens. Attackers who possess the server's RSA public key can create a JWE-wrapped PlainJWT with arbitrary subject and role claims, bypassing signature verification to authenticate as any user including administrators.
SSVC
Exploitation: poc Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-07 04:55 UTC
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Impacted products
Vendor Product Version
pac4j pac4j-jwt Affected: 4.0 , < 4.5.9 (custom)
Affected: 5.0 , < 5.7.9 (custom)
Affected: 6.0 , < 6.3.3 (custom)
    cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*
    cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*
    cpe:2.3:a:pac4j:pac4j:*:*:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website

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            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-347",
              "description": "CWE-347 Improper Verification of Cryptographic Signature",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-14T18:39:47.691Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.pac4j.org/blog/security-advisory-pac4j-jwt-jwtauthenticator.html"
        },
        {
          "tags": [
            "technical-description",
            "exploit"
          ],
          "url": "https://www.codeant.ai/security-research/pac4j-jwt-authentication-bypass-public-key"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/pac4j-jwt-jwtauthenticator-authentication-bypass"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "pac4j-jwt JwtAuthenticator Authentication Bypass",
      "x_generator": {
        "engine": "Vulnogram 0.5.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-29000",
    "datePublished": "2026-03-04T21:49:29.340Z",
    "dateReserved": "2026-03-03T16:42:01.012Z",
    "dateUpdated": "2026-07-14T18:39:47.691Z",
    "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.