{"action":"Upgrade symfony/symfony to 4.4.35 or later.","affected":[{"fixed":"4.4.35","introduced":"4.1.0"},{"fixed":"5.3.12","introduced":"5.0.0"}],"component":"symfony/symfony","cve_ids":["CVE-2021-41270"],"ecosystem":"Packagist","epss":0.014,"exploited":false,"fixed_versions":["4.4.35","5.3.12"],"ghsa_id":"GHSA-2xhg-w2g5-w95x","id":"tcs_01M5KESCYQYW118QGDYESTJ73M","modified_at":"2026-07-08T06:28:50.736319938Z","published_at":"2021-11-24T21:01:23Z","references":["https://osv.dev/vulnerability/GHSA-2xhg-w2g5-w95x","https://github.com/symfony/symfony/security/advisories/GHSA-2xhg-w2g5-w95x","https://nvd.nist.gov/vuln/detail/CVE-2021-41270","https://github.com/symfony/symfony/pull/44243","https://github.com/symfony/symfony/commit/3da6f2d45e7536ccb2a26f52fbaf340917e208a8","https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/serializer/CVE-2021-41270.yaml","https://github.com/FriendsOfPHP/security-advisories/blob/master/symfony/symfony/CVE-2021-41270.yaml","https://github.com/symfony/symfony","https://github.com/symfony/symfony/releases/tag/v5.3.12","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3BPT4SF6SIXFMZARDWED5T32J7JEH3EP","https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QSREFD2TJT5LWKM6S4MD3W26NQQ5WJUP","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3BPT4SF6SIXFMZARDWED5T32J7JEH3EP","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QSREFD2TJT5LWKM6S4MD3W26NQQ5WJUP","https://symfony.com/cve-2021-41270"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"GHSA-2xhg-w2g5-w95x#Packagist/symfony/symfony","url":"https://osv.dev/vulnerability/GHSA-2xhg-w2g5-w95x"}],"summary":"CSV Injection in symfony/serializer"}