CVE-2026-82522

Name	CVE-2026-82522
Description	libjxl before 0.12 contains an integer underflow vulnerability in the container box parser that allows remote attackers to inject arbitrary metadata by exploiting 64-bit box size truncation to size_t on 32-bit platforms. Attackers can supply a crafted JPEG XL file causing the decoder to parse attacker-controlled codestream bytes as phantom box headers, enabling injection of arbitrary metadata (Exif, XMP, IPTC, JUMBF) and potential out-of-bounds reads.
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
jpeg-xl (PTS)	bookworm, bookworm (security)	0.7.0-10+deb12u1	vulnerable
	trixie (security), trixie	0.11.2-0.1~deb13u2	vulnerable
	forky, sid	0.11.2-5.1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
jpeg-xl	source	(unstable)	(unfixed)

https://github.com/libjxl/libjxl/pull/4885
https://github.com/libjxl/libjxl/commit/22ad80af1454f0444ea34115e49ed40517147d68 (v0.12.0)