CVE-2026-8463

{"id": "CVE-2026-8463", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-8463", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-13T17:19:23.875232Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "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:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "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:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "affectedData": [{"repo": "https://github.com/Leont/crypt-argon2", "vendor": "LEONT", "product": "Crypt::Argon2", "versions": [{"status": "affected", "version": "0.017", "lessThan": "0.031", "versionType": "custom"}], "packageName": "Crypt-Argon2", "programFiles": ["lib/Crypt/Argon2.xs"], "collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "programRoutines": [{"name": "Crypt::Argon2::argon2_verify"}]}]}], "published": "2026-05-13T14:18:17.140", "references": [{"url": "https://github.com/Leont/crypt-argon2/commit/92eac03ce63d541e0ead7ea5a89b9b67ce0c0e64.patch", "tags": ["Patch"], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}, {"url": "https://metacpan.org/release/LEONT/Crypt-Argon2-0.031/changes", "tags": ["Release Notes"], "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}, {"url": "http://www.openwall.com/lists/oss-security/2026/05/13/4", "tags": ["Mailing List", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "description": [{"lang": "en", "value": "CWE-126"}, {"lang": "en", "value": "CWE-191"}]}], "descriptions": [{"lang": "en", "value": "Crypt::Argon2 versions from 0.017 before 0.031 for Perl perform a heap out-of-bounds read in argon2_verify on empty encoded input.\n\nThe auto-detect form of argon2_verify passes encoded_len - 1 as the length argument to memchr without checking that encoded_len is non-zero. When the encoded string is empty, the size_t subtraction underflows to SIZE_MAX and memchr scans adjacent heap memory looking for a '$' separator byte.\n\nA caller that invokes argon2_verify against a stored hash that may legitimately be empty (for example a placeholder row or a NULL column materialised as an empty string) reads out-of-bounds heap memory, which can crash the process or leak the position of an adjacent '$' byte into subsequent parsing."}, {"lang": "es", "value": "Las versiones de Crypt::Argon2 desde la 0.017 anteriores a la 0.031 para Perl realizan una lectura fuera de l\u00edmites del heap en argon2_verify con una entrada codificada vac\u00eda.\n\nLa forma de autodetecci\u00f3n de argon2_verify pasa encoded_len - 1 como argumento de longitud a memchr sin verificar que encoded_len no sea cero. Cuando la cadena codificada est\u00e1 vac\u00eda, la resta de size_t subdesborda a SIZE_MAX y memchr escanea memoria heap adyacente buscando un byte separador \u2019$\u2019.\n\nUn llamador que invoca argon2_verify contra un hash almacenado que puede estar leg\u00edtimamente vac\u00edo (por ejemplo, una fila de marcador de posici\u00f3n o una columna NULL materializada como una cadena vac\u00eda) lee memoria heap fuera de l\u00edmites, lo que puede bloquear el proceso o filtrar la posici\u00f3n de un byte \u2019$\u2019 adyacente en el an\u00e1lisis posterior."}], "lastModified": "2026-10-26T14:10:00.130", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:leont:crypt\\:\\:argon2:*:*:*:*:*:perl:*:*", "vulnerable": true, "matchCriteriaId": "665F8DDD-FC30-44AE-8E88-5292B014AB76", "versionEndExcluding": "0.031", "versionStartIncluding": "0.017"}], "operator": "OR"}]}], "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}