CVE-2026-41855

Name	CVE-2026-41855
Description	In an untrusted JMS environment, org.springframework.jms.support.converter.MappingJackson2MessageConverter and org.springframework.jms.support.converter.JacksonJsonMessageConverter allow arbitrary class instantiation, which can lead to unauthorized actions via gadget class deserialization. Affected versions: Spring Framework 7.0.0 through 7.0.7; 6.2.0 through 6.2.18; 6.1.0 through 6.1.27; 5.3.0 through 5.3.48.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libspring-java (PTS)	bullseye	4.3.30-1	vulnerable
	bookworm	4.3.30-2	vulnerable
	trixie	4.3.30-3	vulnerable
	forky, sid	4.3.30-4	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libspring-java	source	(unstable)	(unfixed)	unimportant

https://spring.io/security/cve-2026-41855
Only supported for building applications shipped in Debian, see README.Debian.security