{"schema_version":"1.8.0","id":"GHSA-8cjm-8mp7-r2xf","published":"2026-06-03T15:30:43Z","modified":"2026-08-10T21:42:00.414871501Z","aliases":["BIT-django-2026-8404","CVE-2026-8404","PYSEC-2026-201"],"related":["CGA-w8wr-74cw-w46c"],"summary":"Django: UpdateCacheMiddleware may disclose cached responses due to case-sensitive Cache-Control handling","details":"An issue was discovered in Django 5.2 before 5.2.15 and 6.0 before 6.0.6.\n`django.middleware.cache.UpdateCacheMiddleware` in Django does not match `Cache-Control` response directives case-insensitively, which allows remote attackers to read responses that were incorrectly cached because their `Cache-Control` directives used uppercase or mixed-case values.\nEarlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.\nDjango would like to thank Ahmed Badawe for reporting this issue.","affected":[{"package":{"name":"django","ecosystem":"PyPI","purl":"pkg:pypi/django"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.2.15"}]}],"versions":["1.0.1","1.0.2","1.0.3","1.0.4","1.1","1.1.1","1.1.2","1.1.3","1.1.4","1.10","1.10.1","1.10.2","1.10.3","1.10.4","1.10.5","1.10.6","1.10.7","1.10.8","1.10a1","1.10b1","1.10rc1","1.11","1.11.1","1.11.10","1.11.11","1.11.12","1.11.13","1.11.14","1.11.15","1.11.16","1.11.17","1.11.18","1.11.2","1.11.20","1.11.21","1.11.22","1.11.23","1.11.24","1.11.25","1.11.26","1.11.27","1.11.28","1.11.29","1.11.3","1.11.4","1.11.5","1.11.6","1.11.7","1.11.8","1.11.9","1.11a1","1.11b1","1.11rc1","1.2","1.2.1","1.2.2","1.2.3","1.2.4","1.2.5","1.2.6","1.2.7","1.3","1.3.1","1.3.2","1.3.3","1.3.4","1.3.5","1.3.6","1.3.7","1.4","1.4.1","1.4.10","1.4.11","1.4.12","1.4.13","1.4.14","1.4.15","1.4.16","1.4.17","1.4.18","1.4.19","1.4.2","1.4.20","1.4.21","1.4.22","1.4.3","1.4.4","1.4.5","1.4.6","1.4.7","1.4.8","1.4.9","1.5","1.5.1","1.5.10","1.5.11","1.5.12","1.5.2","1.5.3","1.5.4","1.5.5","1.5.6","1.5.7","1.5.8","1.5.9","1.6","1.6.1","1.6.10","1.6.11","1.6.2","1.6.3","1.6.4","1.6.5","1.6.6","1.6.7","1.6.8","1.6.9","1.7","1.7.1","1.7.10","1.7.11","1.7.2","1.7.3","1.7.4","1.7.5","1.7.6","1.7.7","1.7.8","1.7.9","1.8","1.8.1","1.8.10","1.8.11","1.8.12","1.8.13","1.8.14","1.8.15","1.8.16","1.8.17","1.8.18","1.8.19","1.8.2","1.8.3","1.8.4","1.8.5","1.8.6","1.8.7","1.8.8","1.8.9","1.8a1","1.8b1","1.8b2","1.8c1","1.9","1.9.1","1.9.10","1.9.11","1.9.12","1.9.13","1.9.2","1.9.3","1.9.4","1.9.5","1.9.6","1.9.7","1.9.8","1.9.9","1.9a1","1.9b1","1.9rc1","1.9rc2","2.0","2.0.1","2.0.10","2.0.12","2.0.13","2.0.2","2.0.3","2.0.4","2.0.5","2.0.6","2.0.7","2.0.8","2.0.9","2.0a1","2.0b1","2.0rc1","2.1","2.1.1","2.1.10","2.1.11","2.1.12","2.1.13","2.1.14","2.1.15","2.1.2","2.1.3","2.1.4","2.1.5","2.1.7","2.1.8","2.1.9","2.1a1","2.1b1","2.1rc1","2.2","2.2.1","2.2.10","2.2.11","2.2.12","2.2.13","2.2.14","2.2.15","2.2.16","2.2.17","2.2.18","2.2.19","2.2.2","2.2.20","2.2.21","2.2.22","2.2.23","2.2.24","2.2.25","2.2.26","2.2.27","2.2.28","2.2.3","2.2.4","2.2.5","2.2.6","2.2.7","2.2.8","2.2.9","2.2a1","2.2b1","2.2rc1","3.0","3.0.1","3.0.10","3.0.11","3.0.12","3.0.13","3.0.14","3.0.2","3.0.3","3.0.4","3.0.5","3.0.6","3.0.7","3.0.8","3.0.9","3.0a1","3.0b1","3.0rc1","3.1","3.1.1","3.1.10","3.1.11","3.1.12","3.1.13","3.1.14","3.1.2","3.1.3","3.1.4","3.1.5","3.1.6","3.1.7","3.1.8","3.1.9","3.1a1","3.1b1","3.1rc1","3.2","3.2.1","3.2.10","3.2.11","3.2.12","3.2.13","3.2.14","3.2.15","3.2.16","3.2.17","3.2.18","3.2.19","3.2.2","3.2.20","3.2.21","3.2.22","3.2.23","3.2.24","3.2.25","3.2.3","3.2.4","3.2.5","3.2.6","3.2.7","3.2.8","3.2.9","3.2a1","3.2b1","3.2rc1","4.0","4.0.1","4.0.10","4.0.2","4.0.3","4.0.4","4.0.5","4.0.6","4.0.7","4.0.8","4.0.9","4.0a1","4.0b1","4.0rc1","4.1","4.1.1","4.1.10","4.1.11","4.1.12","4.1.13","4.1.2","4.1.3","4.1.4","4.1.5","4.1.6","4.1.7","4.1.8","4.1.9","4.1a1","4.1b1","4.1rc1","4.2","4.2.1","4.2.10","4.2.11","4.2.12","4.2.13","4.2.14","4.2.15","4.2.16","4.2.17","4.2.18","4.2.19","4.2.2","4.2.20","4.2.21","4.2.22","4.2.23","4.2.24","4.2.25","4.2.26","4.2.27","4.2.28","4.2.29","4.2.3","4.2.30","4.2.4","4.2.5","4.2.6","4.2.7","4.2.8","4.2.9","4.2a1","4.2b1","4.2rc1","5.0","5.0.1","5.0.10","5.0.11","5.0.12","5.0.13","5.0.14","5.0.2","5.0.3","5.0.4","5.0.5","5.0.6","5.0.7","5.0.8","5.0.9","5.0a1","5.0b1","5.0rc1","5.1","5.1.1","5.1.10","5.1.11","5.1.12","5.1.13","5.1.14","5.1.15","5.1.2","5.1.3","5.1.4","5.1.5","5.1.6","5.1.7","5.1.8","5.1.9","5.1a1","5.1b1","5.1rc1","5.2","5.2.1","5.2.10","5.2.11","5.2.12","5.2.13","5.2.14","5.2.2","5.2.3","5.2.4","5.2.5","5.2.6","5.2.7","5.2.8","5.2.9","5.2a1","5.2b1","5.2rc1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-8cjm-8mp7-r2xf/GHSA-8cjm-8mp7-r2xf.json"}},{"package":{"name":"django","ecosystem":"PyPI","purl":"pkg:pypi/django"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.0.0"},{"fixed":"6.0.6"}]}],"versions":["6.0","6.0.1","6.0.2","6.0.3","6.0.4","6.0.5"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-8cjm-8mp7-r2xf/GHSA-8cjm-8mp7-r2xf.json"}}],"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-8404"},{"type":"WEB","url":"https://github.com/django/django/commit/366d9ae6e8d1469c04e9ebdc1bcd098fc14a3b1e"},{"type":"WEB","url":"https://github.com/django/django/commit/b4330259ffbe1a031ed14daab1f35697460f10f2"},{"type":"WEB","url":"https://github.com/django/django/commit/d618d7ae4fec727d5b582bd24f803c28d17bf7cd"},{"type":"WEB","url":"https://docs.djangoproject.com/en/dev/releases/security"},{"type":"PACKAGE","url":"https://github.com/django/django"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-201.yaml"},{"type":"WEB","url":"https://groups.google.com/g/django-announce"},{"type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