CVE-2026-18303

Name	CVE-2026-18303
Description	GIMP TIF File Parsing Stack-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GIMP. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of TIF files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-29399.
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
gimp (PTS)	bullseye	2.10.22-4+deb11u2	vulnerable
	bullseye (security)	2.10.22-4+deb11u8	vulnerable
	bookworm, bookworm (security)	2.10.34-1+deb12u10	vulnerable
	trixie	3.0.4-3+deb13u9	vulnerable
	trixie (security)	3.0.4-3+deb13u8	vulnerable
	forky, sid	3.2.4-3	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
gimp	source	(unstable)	(unfixed)

Notes

https://www.zerodayinitiative.com/advisories/ZDI-26-456/
Fixed by: https://gitlab.gnome.org/GNOME/gimp/-/commit/5633b362026c6e5b2beb559a10cd76fa32a47592