Cleartext transmission of sensitive information in Django - CVE-2026-7666

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Main Vulnerability Database Vulnerabilities #VU133364

Cleartext transmission of sensitive information in Django - CVE-2026-7666

Published: June 4, 2026


Vulnerability identifier: #VU133364
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-7666
CWE-ID: CWE-319
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to the "django.core.mail.backends.smtp.EmailBackend" fails to prevent reuse of a partially-initialized connection after a failed "STARTTLS" handshake. A remote attacker can gain access to sensitive data.


Affected software

Django
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Package Hub 15
openSUSE Leap
openEuler
Fedora
python-django
python-django-help
python3-Django
python311-Django
python-django5

How to mitigate CVE-2026-7666

Install updates from vendor's website.

Django - addressed in versions 5.2.15, 6.0.6
python-django - addressed in versions 2.2.27-23, 4.2.15-16
python-django-help - addressed in versions 2.2.27-23, 4.2.15-16
python3-Django - addressed in versions 2.2.27-23, 4.2.15-16
python311-Django - update to 4.2.11-150600.3.59.1
python-django5 - addressed in versions 5.2.15-1.fc43, 5.2.15-1.fc44

External References

Related Security Bulletins