{"id":"CVE-2019-25777","title":"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 …","summary":"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 …","severity":"none","cwe":["CWE-502","CWE-914"],"product":"YAML","affected":["YAML < 1.27_001"],"published":"2026-10-05","updated":"2026-10-05","sourceUpdated":"2026-10-05T07:16:29.557","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2019-25777","references":[{"url":"https://github.com/ingydotnet/yaml-pm/commit/bace96b5e6661d521c7c515c94a09e081c911fce.patch","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://github.com/ingydotnet/yaml-pm/issues/212","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"},{"url":"https://metacpan.org/release/TINITA/YAML-1.28/changes","label":"9b29abf9-4ab0-4765-b253-1875cd9b441e"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-05T07:14:48.255Z","slug":"CVE-2019-25777","body":"## Overview\n\nYAML 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}