{"action":"Upgrade symfony/routing to 5.4.53 or later.","affected":[{"fixed":"5.4.53","introduced":"0"},{"fixed":"6.4.41","introduced":"6.0.0"},{"fixed":"7.4.13","introduced":"7.0.0"},{"fixed":"8.0.13","introduced":"8.0.0"}],"component":"symfony/routing","cve_ids":["CVE-2026-48784"],"ecosystem":"Packagist","epss":0.00348,"exploited":false,"fixed_versions":["5.4.53","6.4.41","7.4.13","8.0.13"],"ghsa_id":"GHSA-h5x3-xfc9-m39h","id":"tcs_01M5KF3CWSTW92W35PTMGWRMC1","modified_at":"2026-09-10T03:50:49.835469393Z","published_at":"2026-06-15T17:33:46Z","references":["https://osv.dev/vulnerability/GHSA-h5x3-xfc9-m39h","https://github.com/symfony/symfony/security/advisories/GHSA-h5x3-xfc9-m39h","https://github.com/symfony/symfony/commit/4b63c3a3f7af04ecd79c89a594b0b02a01990b1d","https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/routing/CVE-2026-48784.yaml","https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-48784.yaml","https://github.com/symfony/symfony","https://symfony.com/cve-2026-48784"],"severity":{"label":"medium"},"sources":[{"source":"osv","source_id":"GHSA-h5x3-xfc9-m39h","url":"https://osv.dev/vulnerability/GHSA-h5x3-xfc9-m39h"}],"summary":"Symfony: UrlGenerator Dot-Segment Encoding Skips Every Other Chained `../` or `./` → Generated URL Collapses Off-Route Under RFC 3986 Normalization"}