by Kastro
Paper/Archive/CVE-2026-96760

CVE-2026-96760

Authlib Authlib — Authlib library contains a signature‑verification bypass vulnerability

EPSS 0.4%CVSS 9.8
critical.is priorityof 100
37
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 37.6.376 × 207.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Authlib1.7.2–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/authlib/authlibrefkb.cert.org/vuls/id/762428refkb.cert.org/vuls/id/762428