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3.1 Low

CVE-2026-7666 An issue was discovered in Django 6.0 before 6.0.6 and 5.2 before 5.2.15

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.

Affected products and versions

Product Affected versions Fixed in
Django 6.0 6.0 → < 6.0.6 6.0.6
Django 5.2 5.2 → < 5.2.15 5.2.15

References

Timeline

  1. Published
  2. Last modified

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