SB2026071540 - Improper authentication in Flask-HTTPAuth
Published: July 15, 2026
Security Bulletin ID
SB2026071540
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Authentication (CVE-ID: CVE-2026-34531)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: 8.3 [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]
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.
Remediation
Install update from vendor's website.
References
- 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