Improper Authentication in Flask-HTTPAuth - CVE-2026-34531
Published: July 15, 2026
Vulnerability identifier: #VU137734
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-34531
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Miguel Grinberg
Affected software:
Flask-HTTPAuth
Flask-HTTPAuth
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to an error in when processing authentication requests. A remote attacker can bypass authentication process and gain unauthorized access to the application.
How to mitigate CVE-2026-34531
Install updates from vendor's website.
Sources
- https://github.com/miguelgrinberg/Flask-HTTPAuth/releases/tag/v4.8.1
- https://github.com/miguelgrinberg/Flask-HTTPAuth/security/advisories/GHSA-p44q-vqpr-4xmg
- https://github.com/miguelgrinberg/flask-httpauth/commit/b15ffe9e50e110d7174ccd944f642079e1dcf9ee
- https://lists.debian.org/debian-lts-announce/2026/05/msg00049.html