Vulnerability advisory

PYSEC-2026-200

Published Jun 3, 2026Updated Jul 23, 2026OSV record ↗

Also known as BIT-django-2026-7666CVE-2026-7666GHSA-mm6v-q8q9-pgcf

Severity

CVSS 4.0CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Affected versions

django PyPI

Affected	Fixed in
`5.2` to before 5.2.15	`5.2.15`Advisories →
`6.0` to before 6.0.6	`6.0.6`Advisories →
Also listed as affected (21) `5.2` `5.2.1` `5.2.10` `5.2.11` `5.2.12` `5.2.13` `5.2.14` `5.2.2` `5.2.3` `5.2.4` `5.2.5` `5.2.6` `5.2.7` `5.2.8` `5.2.9` `6.0` `6.0.1` `6.0.2` `6.0.3` `6.0.4` `6.0.5`

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.

PYSEC-2026-200

Affected versions

django PyPI

Description

References