{"id":"AZL-86901","summary":"CVE-2026-5089 affecting package perl-YAML-Syck 1.34-1","details":"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 \u003e= 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.","modified":"2026-08-30T05:24:52Z","published":"2026-05-12T17:16:21Z","upstream":["CVE-2026-5089"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5089"}],"affected":[{"package":{"name":"perl-YAML-Syck","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/perl-YAML-Syck"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.34-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-86901.json"}}],"schema_version":"1.9.0"}