CVE catalog
CVE-2026-34531
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 pass
- Severity
- High · CVSS 8.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.32% · Oct 25, 2026
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 their token, then it could potentially authenticate the client request against any of those users. This issue has been patched in version 4.8.1.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | python-flask-httpauth | sid | 4.8.1-1.1 | fixed |
| Debian | python-flask-httpauth | forky | 4.8.1-1.1 | fixed |
| Debian | python-flask-httpauth | trixie | 4.8.0-1 | vulnerable |
| Debian | python-flask-httpauth | bookworm | 4.5.0-4 | vulnerable |
| Cpe | python-flask-httpauth | Not reported | Not reported | vulnerable |
| Cpe | flask-httpauth | Not reported | 4.8.1 | fixed |
| Opensuse | python-Flask-HTTPAuth | leap 16.0 | 4.8.0-bp160.2.1 | fixed |
| Opensuse | python-Flask-HTTPAuth | tumbleweed | 4.8.1-1.1 | fixed |
| Cpe | flask-httpauth | Not reported | 4.8.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | python-flask-httpauth | source | sid | 4.8.1-1.1 | not yet assigned | Not reported | [1132581] |
| Debian | python-flask-httpauth | source | forky | 4.8.1-1.1 | not yet assigned | Not reported | [1132581] |
| Debian | python-flask-httpauth | source | trixie | (unfixed) | not yet assigned | Not reported | [1132581] |
| Debian | python-flask-httpauth | source | bookworm | (unfixed) | not yet assigned | Not reported | [1132581] |
| Cpe | flask-httpauth | cpe | Not reported | 4.8.1 | Not reported | Not reported | Not reported |
| Opensuse | python-Flask-HTTPAuth | rpm | leap 16.0 | 4.8.0-bp160.2.1 | Not reported | OPENSUSE-SU-2026:20576-1 | Not reported |
| Opensuse | python-Flask-HTTPAuth | rpm | tumbleweed | 4.8.1-1.1 | Not reported | OPENSUSE-SU-2026:10518-1 | Not reported |
| Cpe | flask-httpauth | cpe | Not reported | 4.8.1 | Not reported | NVD-CVE-2026-34531 | Not reported |
Notes
[trixie] python-flask-httpauth: Minor issue [bookworm] python-flask-httpauth: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [python3-flask-httpauth]Affected
Source package: [python-flask-httpauth]
Details (2)
4.5.0-4· all · bookwormAffected
nvd · python-flask-httpauth · debian · bookworm; nvd · python-flask-httpauth · debian · 12
4.5.0-4· all · bookwormAffected
nvd · python-flask-httpauth · debian · bookworm; nvd · python-flask-httpauth · debian · 12
- [python-flask-httpauth-doc]Affected
Source package: [python-flask-httpauth]
Details (2)
4.5.0-4· all · bookwormAffected
nvd · python-flask-httpauth · debian · bookworm; nvd · python-flask-httpauth · debian · 12
4.5.0-4· all · bookwormAffected
nvd · python-flask-httpauth · debian · bookworm; nvd · python-flask-httpauth · debian · 12
[Debian 13 (Trixie)]
- [python3-flask-httpauth]Affected
Source package: [python-flask-httpauth]
Details (2)
4.8.0-1· all · trixieAffected
nvd · python-flask-httpauth · debian · 13
4.8.0-1· all · trixieAffected
nvd · python-flask-httpauth · debian · 13
- [python-flask-httpauth-doc]Affected
Source package: [python-flask-httpauth]
Details (2)
4.8.0-1· all · trixieAffected
nvd · python-flask-httpauth · debian · 13
4.8.0-1· all · trixieAffected
nvd · python-flask-httpauth · debian · 13
[openSUSE Tumbleweed]
- [python313-Flask-HTTPAuth]Unknown
Source package: [python-Flask-HTTPAuth]
Details (1)
4.8.1-1.2· noarch · tumbleweedUnknown · Fixed:
4.8.1-1.1Version impact unknown
nvd · python-Flask-HTTPAuth · opensuse · tumbleweed
- [python314-Flask-HTTPAuth]Unknown
Source package: [python-Flask-HTTPAuth]
Details (1)
4.8.1-1.2· noarch · tumbleweedUnknown · Fixed:
4.8.1-1.1Version impact unknown
nvd · python-Flask-HTTPAuth · opensuse · tumbleweed
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_10518-1.json]
- [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]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-34531]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-34531]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:10518-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:20576-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-34531]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34531.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]