PT-2026-45948 · Djangoproject · Django

Jake Howard + 2 · Published 2026-06-03 · Updated 2026-06-03 · CVE-2026-7666

Mitre

CVSS v3.1

3.1

Low

Base vector

AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N

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.

Fix

Cleartext Transmission of Sensitive Information

Weakness Enumeration

CWE-319

Related Identifiers

CVE-2026-7666

Affected Products

Django

References · 4

• https://docs.djangoproject.com/en/dev/releases/security · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-7666 · Security Note
• https://djangoproject.com/weblog/2026/jun/03/security-releases · Vendor Advisory
• https://groups.google.com/g/django-announce · Note