{"action":"Upgrade symfony/symfony to 6.4.40 or later.","affected":[{"fixed":"6.4.40","introduced":"6.4.0"},{"fixed":"7.4.12","introduced":"7.0.0"},{"fixed":"8.0.12","introduced":"8.0.0"}],"component":"symfony/symfony","cve_ids":["CVE-2026-45754"],"ecosystem":"Packagist","epss":0.00445,"exploited":false,"fixed_versions":["6.4.40","7.4.12","8.0.12"],"ghsa_id":"GHSA-64hg-93w9-fc35","id":"tcs_01M5KEWM7W412DDJSCEVF1XABB","modified_at":"2026-09-10T03:50:45.813658398Z","published_at":"2026-05-28T17:22:36Z","references":["https://osv.dev/vulnerability/GHSA-64hg-93w9-fc35","https://github.com/symfony/symfony/security/advisories/GHSA-64hg-93w9-fc35","https://github.com/symfony/symfony/commit/4aaa45dd054f73445f1ab254968b7e60b546cc77","https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/lox24-notifier/CVE-2026-45754.yaml","https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/mailjet-mailer/CVE-2026-45754.yaml","https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2026-45754.yaml","https://github.com/symfony/symfony","https://symfony.com/cve-2026-45754"],"severity":{"label":"medium"},"sources":[{"source":"osv","source_id":"GHSA-64hg-93w9-fc35#Packagist/symfony/symfony","url":"https://osv.dev/vulnerability/GHSA-64hg-93w9-fc35"}],"summary":"Symfony's Mailjet Mailer Webhook Parser Never Verifies the Configured Secret — Unauthenticated Webhook Event Injection"}