CVE-2026-96760
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductAuthlib
PublishedSep 28, 2026
First seenSep 28, 2026
How to fix
Update
- authlib1.9.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| authlibPyPI | v < 1.9.0 | 1.9.0 |
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