Riskcovery

CVE-2026-96760

Authlib library contains a signature‑verification bypass vulnerability

State
Published
Severity
9.8 Critical
Published
Sep 28, 2026
Updated
Oct 1, 2026
Reserved
Sep 23, 2026

Read the record on cve.org

Description

Authlib (v1.7.2 and below) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking for a signature and without requiring a cryptographic key.

Scores

CVSSScoreVectorSource
3.19.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCISA-ADP

Weaknesses

  • CWE-347 Improper Verification of Cryptographic Signature
  • CWE-670 Always-Incorrect Control Flow Implementation
  • CWE-358 Improperly Implemented Security Check for Standard
  • CWE-20 Improper Input Validation

Affected Products

ProductVersions
AuthlibAuthlib
  • 1.7.2Affected

References

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