CVE-2026-96760

EUVD-2026-88465
Authlib (v1.8.0 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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
certccCNA
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 38.07%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources (CNA/ADP records, vendor advisories, Enginsight analysis).
VendorProductVersionSource
authlibauthlib
1.8.0
CNA
Debian logo
Debian Releases
Debian Product
Codename
python-authlib
bookworm
vulnerable
bookworm (security)
vulnerable
forky
1.9.1-1
fixed
sid
1.9.1-1
fixed
trixie
vulnerable
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
python-authlib
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
Common Weakness Enumeration
References
https://github.com/authlib/authlib
https://kb.cert.org/vuls/id/762428
https://www.kb.cert.org/vuls/id/762428