PatchTheCVECVE-2026-34531: Flask-HTTPAuth provides Basic, Digest and Token HTTP authentication for Flask routes
CVE-2026-34531 is a medium-severity flaw (CVSS 6.5) affecting flask-httpauth. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Flask-HTTPAuth provides Basic, Digest and Token HTTP authentication for Flask routes. Prior to version 4.8.1, in a situation where the client makes a request to a token protected resource without passing a token, or passing an empty token, Flask-HTTPAuth would invoke the application's token verification callback function with the token argument set to an empty string. If the application had any users in its database with an empty string set as th
Why this priority
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.5 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | High |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 75%) |
| CISA exploited list | No |
| Weakness | CWE-287 |
| Published | 2026-04-01 |
| Last modified | 2026-10-26 |
Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-34531?
flask-httpauth: upgrade to 4.8.1. Exact commands for each OS are on this page.
Is CVE-2026-34531 being exploited?
CVE-2026-34531 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-34531 affect?
CVE-2026-34531 affects flask-httpauth. Severity is medium (CVSS 6.5). Flask-HTTPAuth provides Basic, Digest and Token HTTP authentication for Flask routes. Prior to version 4.8.1, in a situation where the client makes a request to a token protected resource without passing a token, or passing an empty token,
How urgent is CVE-2026-34531?
Priority 34/100. Remotely exploitable, no login, no user action