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DEBIAN-CVE-2026-34531

Type: advisorySource: OSV1 source record

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.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-34531

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:DEBIAN-CVE-2026-34531

python-flask-httpauth

Source reference: /affected/0/package/name

Affected versions
4.5.0-4

Source reference: /affected/0/versions

4.8.0-1

Source reference: /affected/0/versions

4.8.1-1.1

Source reference: /affected/0/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

python-flask-httpauth

Source reference: /affected/1/package/name

Affected versions
4.8.0-1

Source reference: /affected/1/versions

4.8.1-1.1

Source reference: /affected/1/versions

Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

python-flask-httpauth

Source reference: /affected/2/package/name

Affected versions
4.8.0-1

Source reference: /affected/2/versions

Fixed versions
4.8.1-1.1

Source reference: /affected/2/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "python-flask-httpauth",
      "purl": "pkg:deb/debian/python-flask-httpauth?arch=source&distro=bookworm",
      "ecosystem": "Debian:12"
    },
    "versions": [
      "4.5.0-4",
      "4.8.0-1",
      "4.8.1-1.1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34531.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          }
        ]
      }
    ],
    "package": {
      "name": "python-flask-httpauth",
      "purl": "pkg:deb/debian/python-flask-httpauth?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "4.8.0-1",
      "4.8.1-1.1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34531.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "4.8.1-1.1"
          }
        ]
      }
    ],
    "package": {
      "name": "python-flask-httpauth",
      "purl": "pkg:deb/debian/python-flask-httpauth?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "4.8.0-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34531.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56426 · Revision 1
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Publisher date
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