CVE-2026-7666
Fixed in a distro release EPSS <1%CVSS 3.1
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.
Products: djangoproject django
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| PyPI | django | 5.2.15 |
| PyPI | django | 6.0.6 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | authentik-2025.12 | no fix |
| Chainguard | authentik-2026.2 | 2026.2.5-r9 |
| Chainguard | authentik-2026.5 | 2026.5.4-r1 |
| Chainguard | authentik-fips-2025.12 | no fix |
| Chainguard | authentik-fips-2026.2 | 2026.2.6-r1 |
| Chainguard | authentik-fips-2026.5 | 2026.5.4-r1 |
| Debian:12 | python-django | no fix |
| Debian:13 | python-django | no fix |
| Debian:14 | python-django | 3:5.2.15-1 |
| SUSE:Linux Enterprise Module for Package Hub 15 SP7 | python-Django | 4.2.11-150600.3.59.1 |
| Ubuntu:22.04:LTS | python-django | no fix |
| Ubuntu:24.04:LTS | python-django | no fix |
| Ubuntu:25.10 | python-django | no fix |
| Ubuntu:26.04:LTS | python-django | no fix |
| Ubuntu:26.10 | python-django | no fix |
| Ubuntu:Pro:14.04:LTS | python-django | no fix |
| Ubuntu:Pro:16.04:LTS | python-django | no fix |
| Ubuntu:Pro:18.04:LTS | python-django | no fix |
| Ubuntu:Pro:20.04:LTS | python-django | no fix |
| openSUSE:Leap 16.0 | python-Django | 5.2.4-bp160.9.1 |
| openSUSE:Tumbleweed | python-Django | 5.2.15-1.1 |
| openSUSE:Tumbleweed | python-Django4 | 4.2.30-3.1 |
| openSUSE:Tumbleweed | python-Django5 | 5.2.16-1.1 |
| openSUSE:Tumbleweed | python-Django6 | 6.0.6-1.1 |