{"action":"Upgrade symfony/symfony 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/symfony","cve_ids":["CVE-2026-45065"],"ecosystem":"Packagist","epss":0.00348,"exploited":false,"fixed_versions":["5.4.52","6.4.40","7.4.12","8.0.12"],"ghsa_id":"GHSA-72xp-p242-47p9","id":"tcs_01M5KEXKKMRF1PBDB7S7B7NXKW","modified_at":"2026-09-10T03:50:45.964420097Z","published_at":"2026-05-27T16:55:16Z","references":["https://osv.dev/vulnerability/GHSA-72xp-p242-47p9","https://github.com/symfony/symfony/security/advisories/GHSA-72xp-p242-47p9","https://github.com/symfony/symfony/commit/bcf487c22f3240ba994124e0e0fe8616f3cfc47a","https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/routing/CVE-2026-45065.yaml","https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-45065.yaml","https://github.com/symfony/symfony","https://symfony.com/cve-2026-45065"],"severity":{"label":"medium"},"sources":[{"source":"osv","source_id":"GHSA-72xp-p242-47p9#Packagist/symfony/symfony","url":"https://osv.dev/vulnerability/GHSA-72xp-p242-47p9"}],"summary":"Symfony has a UrlGenerator Route-Requirement Bypass via Unanchored Regex Alternation → Off-Site //host URL Injection"}