{"action":"Upgrade symfony/symfony to 7.4.13 or later.","affected":[{"fixed":"7.4.13","introduced":"7.2.0"},{"fixed":"8.0.13","introduced":"8.0.0"}],"component":"symfony/symfony","cve_ids":["CVE-2026-48747"],"ecosystem":"Packagist","epss":0.00247,"exploited":false,"fixed_versions":["7.4.13","8.0.13"],"ghsa_id":"GHSA-rrj9-5q2j-4gvr","id":"tcs_01M5KF8HJPDZ839Z8APQ2FNK1T","modified_at":"2026-09-10T03:50:50.617414342Z","published_at":"2026-06-15T17:32:28Z","references":["https://osv.dev/vulnerability/GHSA-rrj9-5q2j-4gvr","https://github.com/symfony/symfony/security/advisories/GHSA-rrj9-5q2j-4gvr","https://github.com/symfony/symfony/commit/bdfe9fe0d94d33dfaca0bc2fe0b00b54767b0c88","https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/mailomat-mailer/CVE-2026-48747.yaml","https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-48747.yaml","https://github.com/symfony/symfony","https://symfony.com/cve-2026-48747"],"severity":{"label":"medium"},"sources":[{"source":"osv","source_id":"GHSA-rrj9-5q2j-4gvr#Packagist/symfony/symfony","url":"https://osv.dev/vulnerability/GHSA-rrj9-5q2j-4gvr"}],"summary":"Symfony: Mailomat Mailer Webhook Parser Reads the HMAC Algorithm from the Request: Signature Algorithm Downgrade"}