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    4 vulnerabilities found for signatures by RustCrypto

    CVE-2026-24850 (GCVE-0-2026-24850)

    Vulnerability from cvelistv5 – Published: 2026-01-28 00:24 – Updated: 2026-01-28 14:54
    VLAI
    Title
    ML-DSA Signature Verification Accepts Signatures with Repeated Hint Indices
    Summary
    The ML-DSA crate is a Rust implementation of the Module-Lattice-Based Digital Signature Standard (ML-DSA). Starting in version 0.0.4 and prior to version 0.1.0-rc.4, the ML-DSA signature verification implementation in the RustCrypto `ml-dsa` crate incorrectly accepts signatures with repeated (duplicate) hint indices. According to the ML-DSA specification (FIPS 204 / RFC 9881), hint indices within each polynomial must be **strictly increasing**. The current implementation uses a non-strict monotonic check (`<=` instead of `<`), allowing duplicate indices. This is a regression bug. The original implementation was correct, but a commit in version 0.0.4 inadvertently changed the strict `<` comparison to `<=`, introducing the vulnerability. Version 0.1.0-rc.4 fixes the issue.
    Severity
    5.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-347 - Improper Verification of Cryptographic Signature
    Assigner
    References
    Impacted products
    Vendor Product Version
    RustCrypto signatures Affected: >= 0.0.4, < 0.1.0-rc.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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      "title": "ML-DSA Signature Verification Accepts Signatures with Repeated Hint Indices"
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    CVE-2026-22705 (GCVE-0-2026-22705)

    Vulnerability from cvelistv5 – Published: 2026-01-10 06:14 – Updated: 2026-01-12 16:43
    VLAI
    Title
    RustCrypto: Signatures has timing side-channel in ML-DSA decomposition
    Summary
    RustCrypto: Signatures offers support for digital signatures, which provide authentication of data using public-key cryptography. Prior to version 0.1.0-rc.2, a timing side-channel was discovered in the Decompose algorithm which is used during ML-DSA signing to generate hints for the signature. This issue has been patched in version 0.1.0-rc.2.
    Severity
    6.4 (Medium)
    CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-1240 - Use of a Cryptographic Primitive with a Risky Implementation
    Assigner
    References
    Impacted products
    Vendor Product Version
    RustCrypto signatures Affected: < 0.1.0-rc.2
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-24850 (GCVE-0-2026-24850)

    Vulnerability from nvd – Published: 2026-01-28 00:24 – Updated: 2026-01-28 14:54
    VLAI
    Title
    ML-DSA Signature Verification Accepts Signatures with Repeated Hint Indices
    Summary
    The ML-DSA crate is a Rust implementation of the Module-Lattice-Based Digital Signature Standard (ML-DSA). Starting in version 0.0.4 and prior to version 0.1.0-rc.4, the ML-DSA signature verification implementation in the RustCrypto `ml-dsa` crate incorrectly accepts signatures with repeated (duplicate) hint indices. According to the ML-DSA specification (FIPS 204 / RFC 9881), hint indices within each polynomial must be **strictly increasing**. The current implementation uses a non-strict monotonic check (`<=` instead of `<`), allowing duplicate indices. This is a regression bug. The original implementation was correct, but a commit in version 0.0.4 inadvertently changed the strict `<` comparison to `<=`, introducing the vulnerability. Version 0.1.0-rc.4 fixes the issue.
    Severity
    5.3 (Medium)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
    SSVC
    Exploitation: poc Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-347 - Improper Verification of Cryptographic Signature
    Assigner
    References
    Impacted products
    Vendor Product Version
    RustCrypto signatures Affected: >= 0.0.4, < 0.1.0-rc.4
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-22705 (GCVE-0-2026-22705)

    Vulnerability from nvd – Published: 2026-01-10 06:14 – Updated: 2026-01-12 16:43
    VLAI
    Title
    RustCrypto: Signatures has timing side-channel in ML-DSA decomposition
    Summary
    RustCrypto: Signatures offers support for digital signatures, which provide authentication of data using public-key cryptography. Prior to version 0.1.0-rc.2, a timing side-channel was discovered in the Decompose algorithm which is used during ML-DSA signing to generate hints for the signature. This issue has been patched in version 0.1.0-rc.2.
    Severity
    6.4 (Medium)
    CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
    SSVC
    Exploitation: none Automatable: no Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-1240 - Use of a Cryptographic Primitive with a Risky Implementation
    Assigner
    References
    Impacted products
    Vendor Product Version
    RustCrypto signatures Affected: < 0.1.0-rc.2
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    {
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-22705",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-12T16:42:51.482698Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-12T16:43:06.463Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "signatures",
          "vendor": "RustCrypto",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.1.0-rc.2"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "RustCrypto: Signatures offers support for digital signatures, which provide authentication of data using public-key cryptography. Prior to version 0.1.0-rc.2, a timing side-channel was discovered in the Decompose algorithm which is used during ML-DSA signing to generate hints for the signature. This issue has been patched in version 0.1.0-rc.2."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1240",
              "description": "CWE-1240: Use of a Cryptographic Primitive with a Risky Implementation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-10T06:14:20.292Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/RustCrypto/signatures/security/advisories/GHSA-hcp2-x6j4-29j7",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/RustCrypto/signatures/security/advisories/GHSA-hcp2-x6j4-29j7"
        },
        {
          "name": "https://github.com/RustCrypto/signatures/pull/1144",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/RustCrypto/signatures/pull/1144"
        },
        {
          "name": "https://github.com/RustCrypto/signatures/commit/035d9eef98486ecd00a8bf418c7817eb14dd6558",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/RustCrypto/signatures/commit/035d9eef98486ecd00a8bf418c7817eb14dd6558"
        }
      ],
      "source": {
        "advisory": "GHSA-hcp2-x6j4-29j7",
        "discovery": "UNKNOWN"
      },
      "title": "RustCrypto: Signatures has timing side-channel in ML-DSA decomposition"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-22705",
    "datePublished": "2026-01-10T06:14:20.292Z",
    "dateReserved": "2026-01-08T19:23:09.857Z",
    "dateUpdated": "2026-01-12T16:43:06.463Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}