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TI-2026-65772 Aliases CVE-2026-104056GHSA-8wx9-759m-hfm8

Insufficient verification of data authenticity in Authlib

Priority HIGH 82CWE-345Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass, Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Deferred Red Hat: fix deferred

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA and Red Hat. Impact type from CWE-345 and CWE-829.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.002 9th percentileScored 2026-11-07
Fix Deferred Red Hat: fix deferred

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
authlibAuthlib1.7.2—No fix listedCNA
  • Authlib Vendorauthlib Affected 1.7.2 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:authlib:authlib:*:*:*:*:*:*:*:*——authlib
  • cpe:2.3:a:authlib:authlib:*:*:*:*:*:*:*:* Versions — — ·authlib

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Exploit IntelligenceAffectedNo fix planned: Out of support scope
Lightspeed CoreAffectedNo fix yet: Fix deferred
Migration Toolkit for Applications 8AffectedNo fix yet: Fix deferred
OpenShift LightspeedAffectedNo fix yet: Fix deferred
Red Hat Ansible Automation Platform 2AffectedNo fix yet: Fix deferred
Red Hat Enterprise Linux command line assistantAffectedNo fix yet: Fix deferred
Red Hat OpenShift Virtualization 4AffectedNo fix yet: Fix deferred
Red Hat Quay 3AffectedNo fix yet: Fix deferred
Red Hat Satellite 6AffectedNo fix yet: Fix deferred
Not affected: 1 product
  • Red Hat Hardened Images

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-104056
  2. 2026-10-03 Alias added: GHSA-8wx9-759m-hfm8
  3. 2026-10-05 CVSS score added · CISA ADP
  4. 2026-10-05 Weakness changed · CISA ADP
  5. 2026-10-05 CISA SSVC decision points changed
  6. 2026-10-05 Priority changed: LOW → HIGH

References

Other 1

  • TI-2026-74876 Signature verification bypass in joserfc JWS deserialization CVSS 3.1CRITICAL 9.1
  • TI-2026-22305 Authlib JWS JWK Header Injection: Signature Verification Bypass CVSS 3.1CRITICAL 9.1
  • TI-2025-40202 Resource allocation without limits in authlib joserfc CVSS 4.0CRITICAL 9.2
  • TI-2026-36756 joserfc: HS256/HS384/HS512 verify accepts empty/nil HMAC key (cross-language sibling of CVE-2026-45363) CVSS 4.0HIGH 8.7
  • TI-2026-79518 Authlib fix bypass lets attackers forge HS256 tokens with PEM keys CVSS 3.1CRITICAL 9.1
  • TI-2026-82772 Uncontrolled resource consumption in authlib joserfc CVSS 3.1HIGH 7.5
See all 30 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences