An issue was discovered in 6.0 before 6.0.5 and 5.2 before 5.2.14. Response headers do not vary on cookies if a session is not modified, but SESSION_SAVE_EVERY_REQUEST is True. A remote attacker can steal a user's session after that user visits a cached public page. Earlier, unsupported Django series (such as 5.0.x, 4.1.x, and 3.2.x) were not evaluated and may also be affected.
Django thanks Cantina for reporting this issue.
{
"github_reviewed": true,
"cwe_ids": [
"CWE-539"
],
"github_reviewed_at": "2026-05-08T22:13:26Z",
"nvd_published_at": "2026-05-05T16:16:12Z",
"severity": "LOW"
}