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DEBIAN-CVE-2026-28802

Type: advisorySource: OSV1 source record

Authlib is a Python library which builds OAuth and OpenID Connect servers. From version 1.6.5 to before version 1.6.7, previous tests involving passing a malicious JWT containing alg: none and an empty signature was passing the signature verification step without any changes to the application code when a failure was expected.. This issue has been patched in version 1.6.7.

Announced Source revision 1
Original source ↗

DEBIAN-CVE-2026-28802

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-2026-28802

python-authlib

Source reference: /affected/0/package/name

Affected versions
1.6.0-1

Source reference: /affected/0/versions

1.6.0-1+deb13u1

Source reference: /affected/0/versions

1.6.1-1

Source reference: /affected/0/versions

1.6.3-1

Source reference: /affected/0/versions

1.6.4-1

Source reference: /affected/0/versions

1.6.5-1

Source reference: /affected/0/versions

1.6.6-1

Source reference: /affected/0/versions

1.6.7-1

Source reference: /affected/0/versions

1.6.8-1

Source reference: /affected/0/versions

1.6.9-1

Source reference: /affected/0/versions

1.7.0-1

Source reference: /affected/0/versions

1.7.2-1

Source reference: /affected/0/versions

1.7.2-2

Source reference: /affected/0/versions

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

python-authlib

Source reference: /affected/1/package/name

Affected versions
1.6.0-1

Source reference: /affected/1/versions

1.6.1-1

Source reference: /affected/1/versions

1.6.3-1

Source reference: /affected/1/versions

1.6.4-1

Source reference: /affected/1/versions

1.6.5-1

Source reference: /affected/1/versions

1.6.6-1

Source reference: /affected/1/versions

Fixed versions
1.6.7-1

Source reference: /affected/1/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-authlib",
      "purl": "pkg:deb/debian/python-authlib?arch=source&distro=trixie",
      "ecosystem": "Debian:13"
    },
    "versions": [
      "1.6.0-1",
      "1.6.0-1+deb13u1",
      "1.6.1-1",
      "1.6.3-1",
      "1.6.4-1",
      "1.6.5-1",
      "1.6.6-1",
      "1.6.7-1",
      "1.6.8-1",
      "1.6.9-1",
      "1.7.0-1",
      "1.7.2-1",
      "1.7.2-2"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-28802.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "0"
          },
          {
            "fixed": "1.6.7-1"
          }
        ]
      }
    ],
    "package": {
      "name": "python-authlib",
      "purl": "pkg:deb/debian/python-authlib?arch=source&distro=forky",
      "ecosystem": "Debian:14"
    },
    "versions": [
      "1.6.0-1",
      "1.6.1-1",
      "1.6.3-1",
      "1.6.4-1",
      "1.6.5-1",
      "1.6.6-1"
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-28802.json"
    },
    "ecosystem_specific": {
      "urgency": "not yet assigned"
    }
  }
]

Publisher severity

No explicit severity was provided.

Event
#56708 · Revision 1
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Publisher date
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