Authlib library contains a signature‑verification bypass vulnerability
Summary
| CVE | CVE-2026-96760 |
|---|---|
| State | PUBLISHED |
| Assigner | certcc |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-28 20:17:11 UTC |
| Updated | 2026-09-28 21:17:19 UTC |
| 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. |
Risk And Classification
Problem Types: 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
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/authlib/authlib | [email protected] | github.com | |
| kb.cert.org/vuls/id/762428 | [email protected] | kb.cert.org | |
| www.kb.cert.org/vuls/id/762428 | af854a3a-2127-422b-91ae-364da2661108 | www.kb.cert.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.