CVE-2026-24850

{
  "id": "CVE-2026-24850",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-24850",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-01-28T14:53:25.394412Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "RustCrypto",
          "product": "signatures",
          "versions": [
            {
              "status": "affected",
              "version": ">= 0.0.4, < 0.1.0-rc.4"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-01-28T01:16:15.097",
  "references": [
    {
      "url": "https://csrc.nist.gov/pubs/fips/204/final",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://datatracker.ietf.org/doc/html/rfc9881",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/C2SP/wycheproof",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_44_verify_test.json",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_65_verify_test.json",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/C2SP/wycheproof/blob/master/testvectors_v1/mldsa_87_verify_test.json",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/RustCrypto/signatures/commit/400961412be2e2ab787942cf30e0a9b66b37a54a",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/RustCrypto/signatures/commit/b01c3b73dd08d0094e089aa234f78b6089ec1f38",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/RustCrypto/signatures/issues/894",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/RustCrypto/signatures/pull/895",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/RustCrypto/signatures/security/advisories/GHSA-5x2r-hc65-25f9",
      "source": "security-advisories@github.com"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    },
    {
      "lang": "es",
      "value": "El *crate* ML-DSA es una implementación en Rust del Estándar de Firma Digital Basado en Módulos de Retículos (ML-DSA). A partir de la versión 0.0.4 y antes de la versión 0.1.0-rc.4, la implementación de verificación de firma ML-DSA en el *crate* 'ml-dsa' de RustCrypto acepta incorrectamente firmas con índices de pista repetidos (duplicados). Según la especificación ML-DSA (FIPS 204 / RFC 9881), los índices de pista dentro de cada polinomio deben ser estrictamente crecientes. La implementación actual utiliza una comprobación monótona no estricta ('&lt;=' en lugar de '&lt;'), permitiendo índices duplicados. Esto es un error de regresión. La implementación original era correcta, pero un *commit* en la versión 0.0.4 cambió inadvertidamente la comparación estricta '&lt;' a '&lt;=', introduciendo la vulnerabilidad. La versión 0.1.0-rc.4 corrige el problema."
    }
  ],
  "lastModified": "2026-06-17T10:23:42.150",
  "sourceIdentifier": "security-advisories@github.com"
}