{"action":"Upgrade symfony/yaml to 5.4.52 or later.","affected":[{"fixed":"5.4.52","introduced":"0"},{"fixed":"6.4.40","introduced":"6.0.0"},{"fixed":"7.4.12","introduced":"7.0.0"},{"fixed":"8.0.12","introduced":"8.0.0"}],"component":"symfony/yaml","cve_ids":["CVE-2026-45305"],"ecosystem":"Packagist","epss":0.00684,"exploited":false,"fixed_versions":["5.4.52","6.4.40","7.4.12","8.0.12"],"ghsa_id":"GHSA-9frc-8383-795m","id":"tcs_01M5KF00V71223PTHTF5CCBEVD","modified_at":"2026-09-10T03:51:05.233135111Z","published_at":"2026-05-27T21:34:35Z","references":["https://osv.dev/vulnerability/GHSA-9frc-8383-795m","https://github.com/symfony/symfony/security/advisories/GHSA-9frc-8383-795m","https://github.com/symfony/symfony/commit/9749cd43c5e09b3735093623670b21b9d8a056cb","https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-45305.yaml","https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/yaml/CVE-2026-45305.yaml","https://github.com/symfony/symfony","https://symfony.com/cve-2026-45305"],"severity":{"label":"low"},"sources":[{"source":"osv","source_id":"GHSA-9frc-8383-795m","url":"https://osv.dev/vulnerability/GHSA-9frc-8383-795m"}],"summary":"Symfony's YAML Parser has a ReDoS via Catastrophic Backtracking in Parser::cleanup() Regex"}