CVE-2026-43001

Name	CVE-2026-43001
Description	An issue was discovered in OpenStack Keystone 13 through 29. POST /v3/credentials did not validate that the caller-supplied project_id for an EC2-type credential matched the project of the authenticating application credential. This allowed an attacker holding an unrestricted application credential for project A to create an EC2 credential targeting project B; a subsequent /v3/ec2tokens exchange would then issue a Keystone token scoped to project B while still carrying the original app_cred_id, enabling cross-project lateral movement within the credential owner's role footprint.
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
keystone (PTS)	bullseye	2:18.0.0-3+deb11u1	vulnerable
	bullseye (security)	2:18.1.0-1+deb11u2	vulnerable
	bookworm, bookworm (security)	2:22.0.2-0+deb12u1	vulnerable
	trixie (security), trixie	2:27.0.0-3+deb13u1	vulnerable
	forky, sid	2:29.0.1-1	vulnerable

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

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

https://bugs.launchpad.net/keystone/+bug/2149775
https://review.opendev.org/c/openstack/keystone/+/985804