{"id":"USN-8398-2","aliases":[],"status":"published","title":"nginx regression","description":"USN-8398-1 fixed a vulnerability in nginx. The update introduced a\nregression causing nginx to crash when being used with external modules.\nThis update reverts the fix for CVE-2026-49975 pending further\ninvestigation.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that nginx incorrectly handled certain cookie headers in\n the HTTP/2 implementation. A remote attacker could possibly use this issue\n to cause nginx to consume excessive resources, resulting in a denial of\n service.","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2026-06-09T13:48:05Z","modified":"2026-06-09T21:15:20Z","fixes":[{"ecosystem":"Ubuntu:22.04:LTS","package":"nginx","fixed_in":["1.18.0-6ubuntu14.14"],"sources":["osv"]},{"ecosystem":"Ubuntu:24.04:LTS","package":"nginx","fixed_in":["1.24.0-2ubuntu7.11"],"sources":["osv"]},{"ecosystem":"Ubuntu:25.10","package":"nginx","fixed_in":["1.28.0-6ubuntu1.6"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"nginx","fixed_in":["1.28.3-2ubuntu1.4"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"nginx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-6ubuntu14.14"}]}],"versions":["1.18.0-6ubuntu11","1.18.0-6ubuntu12","1.18.0-6ubuntu14","1.18.0-6ubuntu14.1","1.18.0-6ubuntu14.2","1.18.0-6ubuntu14.3","1.18.0-6ubuntu14.4","1.18.0-6ubuntu14.5","1.18.0-6ubuntu14.6","1.18.0-6ubuntu14.7","1.18.0-6ubuntu14.8","1.18.0-6ubuntu14.10","1.18.0-6ubuntu14.11","1.18.0-6ubuntu14.12","1.18.0-6ubuntu14.13"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"nginx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.24.0-2ubuntu7.11"}]}],"versions":["1.24.0-1ubuntu1","1.24.0-2ubuntu1","1.24.0-2ubuntu2","1.24.0-2ubuntu3","1.24.0-2ubuntu4","1.24.0-2ubuntu6","1.24.0-2ubuntu7","1.24.0-2ubuntu7.1","1.24.0-2ubuntu7.3","1.24.0-2ubuntu7.4","1.24.0-2ubuntu7.5","1.24.0-2ubuntu7.6","1.24.0-2ubuntu7.7","1.24.0-2ubuntu7.8","1.24.0-2ubuntu7.9","1.24.0-2ubuntu7.10"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"nginx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.28.0-6ubuntu1.6"}]}],"versions":["1.26.3-2ubuntu1","1.26.3-3ubuntu1","1.26.3-3ubuntu2","1.26.3-3ubuntu3","1.28.0-3ubuntu1","1.28.0-4ubuntu1","1.28.0-6ubuntu1","1.28.0-6ubuntu1.1","1.28.0-6ubuntu1.2","1.28.0-6ubuntu1.3","1.28.0-6ubuntu1.4","1.28.0-6ubuntu1.5"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"nginx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.28.3-2ubuntu1.4"}]}],"versions":["1.28.0-6ubuntu1","1.28.1-2ubuntu1","1.28.1-3ubuntu1","1.28.2-2ubuntu1","1.28.3-2ubuntu1","1.28.3-2ubuntu1.1","1.28.3-2ubuntu1.2","1.28.3-2ubuntu1.3"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-8398-2","tags":["advisory"]},{"url":"https://launchpad.net/bugs/2155992","tags":["report"]}],"sources":{"osv":[{"id":"USN-8398-2","title":"nginx regression","description":"USN-8398-1 fixed a vulnerability in nginx. The update introduced a\nregression causing nginx to crash when being used with external modules.\nThis update reverts the fix for CVE-2026-49975 pending further\ninvestigation.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that nginx incorrectly handled certain cookie headers in\n the HTTP/2 implementation. A remote attacker could possibly use this issue\n to cause nginx to consume excessive resources, resulting in a denial of\n service.","status":"published","published":"2026-06-09T13:48:05Z","modified":"2026-06-09T21:15:20.239079527Z","updated_at":"2026-11-02T16:58:25.103481Z"}]}}