Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Django versions 5.2 before 5.2.14 and 6.0 before 6.0.5 are affected. The UpdateCacheMiddleware caches responses whose Vary header contains an asterisk, which can cause private data to be stored and served to other users. The source does not say what access an attacker needs to exploit this. Upgrade to Django 5.2.14 or 6.0.5. Earlier unsupported series were not evaluated and may also be affected.
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 0.0036, the 29th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:34 UTC First seen by agentprime
- 31 Oct 2026, 14:34 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-5hrc-gvxj-w55p
- OSV: GHSA-5hrc-gvxj-w55p
- nvd.nist.gov/vuln/detail/CVE-2026-6907
- docs.djangoproject.com/en/dev/releases/security
- github.com/django/django
- github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-55.yaml
- groups.google.com/g/django-announce
- www.djangoproject.com/weblog/2026/may/05/security-releases