{"id":"CVE-2019-25777","published":"2026-10-05T07:16:29.557","lastModified":"2026-10-06T17:17:09.893","description":"YAML versions before 1.27_001 for Perl allow a loaded perl/glob document to replace any package variable, which can lead to arbitrary code execution.\n\nA perl/glob document names a package and a symbol, and supplies the value assigned to it. Nothing restricts the name, so the target can be @INC or YAML's own load options.\n\nA perl/glob document that sets $YAML::LoadCode or $YAML::UseCode turns on code loading, which is off by default, for every later Load() in the process. A perl/code document is then passed to a string eval, so an attacker who supplies two documents to separate Load() calls in one process can execute arbitrary Perl code.","cvssScore":7.3,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","cwes":["CWE-502","CWE-914"],"vendors":[],"products":[],"references":[{"url":"https://github.com/ingydotnet/yaml-pm/commit/bace96b5e6661d521c7c515c94a09e081c911fce.patch","tags":[]},{"url":"https://github.com/ingydotnet/yaml-pm/issues/212","tags":[]},{"url":"https://metacpan.org/release/TINITA/YAML-1.28/changes","tags":[]},{"url":"http://www.openwall.com/lists/oss-security/2026/10/05/7","tags":[]}],"exploitRefs":[{"url":"https://github.com/ingydotnet/yaml-pm/commit/bace96b5e6661d521c7c515c94a09e081c911fce.patch","tags":[]},{"url":"https://github.com/ingydotnet/yaml-pm/issues/212","tags":[]}],"hasPoc":true,"ai":null}