CVE-2026-80179

Name	CVE-2026-80179
Description	A flaw was found in jwcrypto. A remote attacker can send a specially crafted JSON Web Encryption (JWE) token containing numerous period delimiters. This malformed token can force the JWE.deserialize() function to allocate excessive memory, leading to a MemoryError. This issue results in a denial of service (DoS) for services that process untrusted JWE values.
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	1145983

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
python-jwcrypto (PTS)	bookworm	1.1.0-1+deb12u1	vulnerable
	trixie	1.5.6-1.1~deb13u1	vulnerable
	forky, sid	1.5.6-1.2	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
python-jwcrypto	source	(unstable)	(unfixed)			1145983

Notes

[trixie] - python-jwcrypto <no-dsa> (Minor issue)
[bookworm] - python-jwcrypto <postponed> (Minor issue)
https://github.com/latchset/jwcrypto/security/advisories/GHSA-96rv-c4vc-h4f4