CVE-2026-96760Critical· 9.8▾ AbyssalPoC availableAuthlib (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 f…
▾ Abyssal zone — Critical with a public exploit or in-the-wild use
impact 53.9 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 29.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.1%
— → 7.5
none → high
1 GitHub repo
Last analysed / modified upstream
7.5 → 9.8
high → critical
0.1% → 0.4%
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
authlib <= 1.8.0Patched in:
authlib 1.9.0Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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