GHSA-8cjm-8mp7-r2xf: django (CVE-2026-8404)

Package	Ecosystem	Affected	Fixed in
django	PyPI	<5.2.15 \|\| >=6.0.0, <6.0.6	5.2.15, 6.0.6

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Django versions 5.2 before 5.2.15 and 6.0 before 6.0.6 are affected. UpdateCacheMiddleware does not match Cache-Control response directives case-insensitively, so a remote attacker may be able to read responses that were cached incorrectly because their directives used uppercase or mixed-case values. Upgrade to Django 5.2.15 or 6.0.6. Earlier unsupported series were not evaluated and may also be affected.

Written 4 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
2.3	Low	4.0	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N	CNA (DSF)

CISA KEV Not listed.
EPSS 0.0027, the 19th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 14:29 UTC First seen by agentprime
31 Oct 2026, 14:29 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.