CVE-2026-34531

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Source
https://cve.org/CVERecord?id=CVE-2026-34531
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34531.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-34531
Aliases
Downstream
Related
Published
2026-04-01T20:44:10.740Z
Modified
2026-07-15T01:49:03.799123698Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N CVSS Calculator
Summary
Flask-HTTPAuth invokes token verification callback when missing or empty token was given by client
Details

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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34531.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-287"
    ]
}
References

Affected packages

Git / github.com/miguelgrinberg/flask-httpauth

Affected ranges

Type
GIT
Repo
https://github.com/miguelgrinberg/flask-httpauth
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
a3286175bd3594398e2fd7c175e808ef6629a26b
Fixed
b15ffe9e50e110d7174ccd944f642079e1dcf9ee
Database specific 
{
    "cpe": "cpe:2.3:a:miguelgrinberg:flask-httpauth:*:*:*:*:*:python:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "4.8.1"
        }
    ],
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.5
v0.6
v1.*
v1.0.0
v1.1.0
v2.*
v2.0.0
v2.1.0
v2.2.0
v2.2.1
v2.3.0
v2.4.0
v2.5.0
v2.6.0
v2.7.0
v2.7.1
v2.7.2
v3.*
v3.0.0
v3.0.1
v3.0.2
v3.1.0
v3.1.1
v3.1.2
v3.2.0
v3.2.1
v3.2.2
v3.2.3
v3.2.4
v3.3.0
v4.*
v4.0.0
v4.1.0
v4.2.0
v4.3.0
v4.4.0
v4.5.0
v4.6.0
v4.7.0
v4.8.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-34531.json"