Low severity3.1NVD Advisory· Published Jun 3, 2026· Updated Jul 21, 2026
CVE-2026-7666
CVE-2026-7666
Description
An issue was discovered in Django 6.0 before 6.0.6 and 5.2 before 5.2.15. django.core.mail.backends.smtp.EmailBackend in Django fails to prevent reuse of a partially-initialized connection after a failed STARTTLS handshake when fail_silently=True, which allows on-path network attackers to read email content via cleartext interception. 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 would like to thank Kasper Dupont for reporting this issue.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
djangoPyPI | >= 5.2, < 5.2.15 | 5.2.15 |
djangoPyPI | >= 6.0, < 6.0.6 | 6.0.6 |
Affected products
13- osv-coords10 versionspkg:apk/chainguard/authentik-2026.5pkg:rpm/suse/python-Django&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP7pkg:rpm/opensuse/python-Django&distro=openSUSE%20Tumbleweedpkg:apk/chainguard/authentik-2026.2pkg:apk/chainguard/authentik-fips-2026.5pkg:rpm/opensuse/python-Django6&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/python-Django&distro=openSUSE%20Leap%2016.0pkg:bitnami/djangopkg:rpm/opensuse/python-Django4&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/python-Django5&distro=openSUSE%20Tumbleweed
< 2026.5.4-r1+ 9 more
- (no CPE)range: < 2026.5.4-r1
- (no CPE)range: < 4.2.11-150600.3.59.1
- (no CPE)range: < 5.2.15-1.1
- (no CPE)range: < 2026.2.5-r9
- (no CPE)range: < 2026.5.4-r1
- (no CPE)range: < 6.0.6-1.1
- (no CPE)range: < 5.2.4-bp160.9.1
- (no CPE)range: >= 5.2.0, < 5.2.15
- (no CPE)range: < 4.2.30-3.1
- (no CPE)range: < 5.2.16-1.1
- Range: 6.0 < 6.0.6, 5.2 < 5.2.15
Patches
Vulnerability mechanics
References
8- docs.djangoproject.com/en/dev/releases/security/nvdPatchVendor Advisory
- www.djangoproject.com/weblog/2026/jun/03/security-releases/nvdPatchVendor Advisory
- github.com/advisories/GHSA-mm6v-q8q9-pgcfghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-7666ghsaADVISORY
- docs.djangoproject.com/en/dev/releases/securityghsaWEB
- github.com/pypa/advisory-database/tree/main/vulns/django/PYSEC-2026-200.yamlghsaWEB
- groups.google.com/g/django-announcenvdRelease NotesWEB
- www.djangoproject.com/weblog/2026/jun/03/security-releasesghsaWEB
News mentions
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