Description
Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL.
Published: 2026-10-01
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

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Tracking

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Advisories

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History

Mon, 05 Oct 2026 19:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-345
CWE-829
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Fri, 02 Oct 2026 14:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20

Fri, 02 Oct 2026 12:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-346
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'}

threat_severity

Moderate


Thu, 01 Oct 2026 20:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-20

Thu, 01 Oct 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Authlib
Authlib authlib
Vendors & Products Authlib
Authlib authlib

Thu, 01 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Description Authlib version 1.7.2 and below contains a vulnerability where discovery JSON metadata is cached without validation or issuer-origin binding. This allows a poisoned discovery response to replace all endpoint values with attacker-controlled values rather than endpoint URLs that share the origin of the configured server metadata URL.
Title CVE-2026-104056
References

cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-10-05T18:21:14.480Z

Reserved: 2026-10-01T18:01:19.689Z

Link: CVE-2026-104056

cve-icon Vulnrichment

Updated: 2026-10-05T18:21:02.943Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-01T19:17:19.033

Modified: 2026-10-05T19:17:14.327

Link: CVE-2026-104056

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-01T18:03:27Z

Links: CVE-2026-104056 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-02T15:30:12Z

Weaknesses
  • CWE-345

    Insufficient Verification of Data Authenticity

  • CWE-346

    Origin Validation Error

  • CWE-829

    Inclusion of Functionality from Untrusted Control Sphere