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. When the SMTP email backend is used with fail_silently=True, a failed STARTTLS handshake can leave a partially initialized connection in place for reuse, so an on-path network attacker may be able to read email content sent over that connection in cleartext. Upgrade to Django 5.2.15 or 6.0.6. Earlier unsupported series were not evaluated.
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:H/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 0.0015, the 4th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:11 UTC First seen by agentprime
- 31 Oct 2026, 14:11 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-mm6v-q8q9-pgcf
- OSV: GHSA-mm6v-q8q9-pgcf
- nvd.nist.gov/vuln/detail/CVE-2026-7666
- docs.djangoproject.com/en/dev/releases/security
- github.com/django/django
- github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-200.yaml
- groups.google.com/g/django-announce
- www.djangoproject.com/weblog/2026/jun/03/security-releases