{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-5089", "assignerOrgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "state": "PUBLISHED", "assignerShortName": "CPANSec", "dateReserved": "2026-03-28T19:33:37.653Z", "datePublished": "2026-05-12T16:14:21.951Z", "dateUpdated": "2026-05-14T13:51:01.952Z"}, "containers": {"cna": {"affected": [{"collectionURL": "https://cpan.org/modules", "defaultStatus": "unaffected", "packageName": "YAML-Syck", "product": "YAML::Syck", "programFiles": ["perl_syck.h"], "repo": "https://github.com/toddr/YAML-Syck", "vendor": "TODDR", "versions": [{"lessThan": "1.38", "status": "affected", "version": "0", "versionType": "custom"}]}], "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."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-124", "description": "CWE-124 Buffer Underwrite ('Buffer Underflow')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "9b29abf9-4ab0-4765-b253-1875cd9b441e", "shortName": "CPANSec", "dateUpdated": "2026-05-12T16:14:21.951Z"}, "references": [{"tags": ["release-notes"], "url": "https://metacpan.org/release/TODDR/YAML-Syck-1.38/changes"}, {"tags": ["issue-tracking"], "url": "https://github.com/cpan-authors/YAML-Syck/issues/132"}, {"tags": ["issue-tracking"], "url": "https://github.com/cpan-authors/YAML-Syck/pull/133"}, {"tags": ["patch"], "url": "https://github.com/cpan-authors/YAML-Syck/commit/208a4d3bd1b5cdb4a791a6e3905bd6bd45e9d005.patch"}], "solutions": [{"lang": "en", "value": "Upgrade to YAML::Syck version 1.38 or later."}], "source": {"discovery": "UNKNOWN"}, "title": "YAML::Syck versions before 1.38 for Perl has an out-of-bounds read", "x_generator": {"engine": "cpansec-cna-tool 0.1"}}, "adp": [{"title": "CVE Program Container", "references": [{"url": "http://www.openwall.com/lists/oss-security/2026/05/12/16"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2026-05-12T18:35:46.042Z"}}, {"references": [{"url": "https://github.com/cpan-authors/YAML-Syck/issues/132", "tags": ["exploit"]}], "metrics": [{"cvssV3_1": {"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"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-05-14T13:50:53.123874Z", "id": "CVE-2026-5089", "options": [{"Exploitation": "poc"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-14T13:51:01.952Z"}}]}}