CVE-2026-5089

{"id": "CVE-2026-5089", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-5089", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-14T13:50:53.123874Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.3, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}, "impactScore": 3.4, "exploitabilityScore": 3.9}]}, "affected": [{"source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "affectedData": [{"repo": "https://github.com/toddr/YAML-Syck", "vendor": "TODDR", "product": "YAML::Syck", "versions": [{"status": "affected", "version": "0", "lessThan": "1.38", "versionType": "custom"}], "packageName": "YAML-Syck", "programFiles": ["perl_syck.h"], "collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected"}]}], "published": "2026-05-12T17:16:21.720", "references": [{"url": "https://github.com/cpan-authors/YAML-Syck/commit/208a4d3bd1b5cdb4a791a6e3905bd6bd45e9d005.patch", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}, {"url": "https://github.com/cpan-authors/YAML-Syck/issues/132", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}, {"url": "https://github.com/cpan-authors/YAML-Syck/pull/133", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}, {"url": "https://metacpan.org/release/TODDR/YAML-Syck-1.38/changes", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}, {"url": "http://www.openwall.com/lists/oss-security/2026/05/12/16", "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://github.com/cpan-authors/YAML-Syck/issues/132", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Deferred", "weaknesses": [{"type": "Secondary", "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "description": [{"lang": "en", "value": "CWE-124"}]}], "descriptions": [{"lang": "en", "value": "YAML::Syck versions before 1.38 for Perl has an out-of-bounds read.\n\nThe base60 (sexagesimal) parsing code in perl_syck.h has a buffer underflow bug in both int#base60 and float#base60 handlers. When processing the leftmost segment of a colon-separated value (e.g., the 1 in 1:30:45), the inner while loop can decrement a pointer past the start of the string buffer:\n\n while ( colon >= ptr && *colon != ':' )\n {\n colon--;\n }\n if ( *colon == ':' ) *colon = '\\0'; // colon may be ptr-1 here\n\nWhen no colon is found (final/leftmost segment), colon becomes ptr-1, and the subsequent *colon dereference reads one byte before the allocated buffer."}, {"lang": "es", "value": "Las versiones de YAML::Syck anteriores a la 1.38 para Perl tienen una lectura fuera de l\u00edmites.\n\nEl c\u00f3digo de an\u00e1lisis (parsing) base60 (sexagesimal) en perl_syck.h tiene un error de subdesbordamiento de b\u00fafer en los manejadores int#base60 y float#base60. Al procesar el segmento m\u00e1s a la izquierda de un valor separado por dos puntos (p. ej., el 1 en 1:30:45), el bucle \u2019while\u2019 interno puede decrementar un puntero m\u00e1s all\u00e1 del inicio del b\u00fafer de cadena:\n\n while ( colon >= ptr && colon != \u2019:\u2019 )\n {\n colon--;\n }\n if ( colon == \u2019:\u2019 ) colon = \u2019\\0\u2019; // \u2019colon\u2019 puede ser \u2019ptr-1\u2019 aqu\u00ed\n\nCuando no se encuentra ning\u00fan dos puntos (segmento final/m\u00e1s a la izquierda), \u2019colon\u2019 se convierte en \u2019ptr-1\u2019, y la desreferencia subsiguiente de colon lee un byte antes del b\u00fafer asignado."}], "lastModified": "2026-10-26T18:10:00.173", "sourceIdentifier": "9b29abf9-4ab0-4765-b253-1875cd9b441e"}