{"id":"GHSA-f57v-q966-7fh6","aliases":["CLSA-2026-1784077475"],"status":"published","title":"Monolog Header injection in NativeMailerHandler","description":"A header injection vulnerability has been identified in the NativeMailerHandler of the Monolog library. This vulnerability may allow an attacker to manipulate email headers when log messages are sent via email.","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-74"],"published":"2024-05-15T23:08:13Z","modified":"2026-10-15T09:47:53Z","fixes":[{"ecosystem":"Packagist","package":"monolog/monolog","fixed_in":["1.12.0"],"sources":["ghsa","osv"]},{"ecosystem":"TuxCare:Packagist","package":"monolog/monolog","fixed_in":["1.11.0-p1+tuxcare"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"monolog/monolog","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.8.0"},{"fixed":"1.12.0"}]}]},{"source":"osv","ecosystem":"TuxCare:Packagist","package":"monolog/monolog","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.11.0"},{"fixed":"1.11.0-p1+tuxcare"}]}],"versions":["1.11.0"]},{"source":"osv","ecosystem":"Packagist","package":"monolog/monolog","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.8.0"},{"fixed":"1.12.0"}]}],"versions":["1.10.0","1.11.0","1.8.0","1.9.0","1.9.1"]}],"references":[{"url":"https://github.com/Seldaek/monolog/issues/458","tags":["web"]},{"url":"https://github.com/Seldaek/monolog/pull/448#issuecomment-68208704","tags":["web"]},{"url":"https://github.com/Seldaek/monolog/commit/515a096c864b00b3967f7f601680f85d4a2e4001","tags":["web"]},{"url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/monolog/monolog/2014-12-29-1.yaml","tags":["web"]},{"url":"https://github.com/advisories/GHSA-f57v-q966-7fh6"},{"url":"https://github.com/Seldaek/monolog","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-f57v-q966-7fh6","title":"Monolog Header injection in NativeMailerHandler","description":"A header injection vulnerability has been identified in the NativeMailerHandler of the Monolog library. This vulnerability may allow an attacker to manipulate email headers when log messages are sent via email.","status":"published","published":"2024-05-15T23:08:13Z","modified":"2024-05-15T23:08:13Z","cwes":["CWE-74"],"updated_at":"2026-11-02T14:37:49.987036Z"}],"osv":[{"id":"CLSA-2026-1784077475","title":"TuxCare security update for monolog/monolog (1 CVE)","description":"TuxCare rebuilt monolog/monolog to address 1 CVE. Fixed in 1.11.0-p1+tuxcare.","status":"published","published":"2026-08-04T14:52:43Z","modified":"2026-10-15T09:47:53.54583512Z","updated_at":"2026-11-02T15:43:46.151924Z"},{"id":"GHSA-f57v-q966-7fh6","title":"Monolog Header injection in NativeMailerHandler","description":"A header injection vulnerability has been identified in the NativeMailerHandler of the Monolog library. This vulnerability may allow an attacker to manipulate email headers when log messages are sent via email.","status":"published","published":"2024-05-15T23:08:13Z","modified":"2024-11-29T05:40:52.145864Z","cwes":["CWE-74"],"updated_at":"2026-11-02T15:46:46.006631Z"}]}}