CVE-2026-96760

Name	CVE-2026-96760
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1150509

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
python-authlib (PTS)	bookworm	1.2.0-1+deb12u1	vulnerable
	bookworm (security)	1.2.0-1+deb12u2	vulnerable
	trixie	1.6.0-1+deb13u1	vulnerable
	forky, sid	1.7.2-2	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
python-authlib	source	(unstable)	(unfixed)			1150509

Notes

https://kb.cert.org/vuls/id/762428
https://github.com/authlib/authlib/issues/940
https://github.com/authlib/authlib/pull/938#issuecomment-5981484744
Fixed by: https://github.com/authlib/authlib/commit/6c11a02da8730914cea08ec195f1108a40dc6733 (v1.9.0)