CVE-2026-86776

Name	CVE-2026-86776
Description	KeePass versions 2.35 through 2.61.1 fail to validate KDBX header field sizes before memory allocation in the ReadHeaderField function. Attackers can craft a malicious KDBX file declaring excessive header field lengths to trigger allocation of gigabytes of memory, causing the application to consume resources and terminate.
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
keepass2 (PTS)	bookworm	2.47+dfsg-2	vulnerable
	trixie	2.57+dfsg-3	vulnerable
	forky, sid	2.60+dfsg-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
keepass2	source	(unstable)	(unfixed)

https://github.com/KSecur1ty/KDBX-Header-Size-Mirage-POC
check upstream details