{"id":"AZL-92913","summary":"CVE-2026-57075 affecting package perl-YAML-Syck 1.34-1","details":"YAML::Syck versions before 1.47 for Perl allow an out-of-bounds read via a signed-char lookup-table index in syck_base64dec.\n\nThe base64 decoder in the bundled libsyck indexes the 256-entry static table b64_xtable with a signed char, so any !!binary byte \u003e= 0x80 sign-extends to a negative index and reads before the table. The decoder receives the raw bytes of any !!binary node, a standard YAML type not gated by $LoadBlessed or $LoadCode, so it is reached on the default Load path.\n\nAny caller that runs Load or LoadFile on an untrusted document containing a !!binary scalar with a high-bit byte triggers the read, and the value read can surface in the decoded result.","modified":"2026-08-30T05:24:52Z","published":"2026-07-16T22:17:43Z","upstream":["CVE-2026-57075"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-57075"}],"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-92913.json"}}],"schema_version":"1.9.0"}