CVE-2026-24850

{"id": "CVE-2026-24850", "cveTags": [], "metrics": {"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}]}, "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": "Primary", "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 implementaci\u00f3n en Rust del Est\u00e1ndar de Firma Digital Basado en M\u00f3dulos de Ret\u00edculos (ML-DSA). A partir de la versi\u00f3n 0.0.4 y antes de la versi\u00f3n 0.1.0-rc.4, la implementaci\u00f3n de verificaci\u00f3n de firma ML-DSA en el *crate* 'ml-dsa' de RustCrypto acepta incorrectamente firmas con \u00edndices de pista repetidos (duplicados). Seg\u00fan la especificaci\u00f3n ML-DSA (FIPS 204 / RFC 9881), los \u00edndices de pista dentro de cada polinomio deben ser estrictamente crecientes. La implementaci\u00f3n actual utiliza una comprobaci\u00f3n mon\u00f3tona no estricta ('&lt;=' en lugar de '&lt;'), permitiendo \u00edndices duplicados. Esto es un error de regresi\u00f3n. La implementaci\u00f3n original era correcta, pero un *commit* en la versi\u00f3n 0.0.4 cambi\u00f3 inadvertidamente la comparaci\u00f3n estricta '&lt;' a '&lt;=', introduciendo la vulnerabilidad. La versi\u00f3n 0.1.0-rc.4 corrige el problema."}], "lastModified": "2026-04-15T00:35:42.020", "sourceIdentifier": "security-advisories@github.com"}