CVE-2026-42999

Name	CVE-2026-42999
Description	An issue was discovered in OpenStack Keystone before 29.0.2. The Keystone RBAC policy enforcer in enforce_call unconditionally merges the raw JSON request body into the policy enforcement dictionary via policy_dict.update(json_input.copy()), overwriting trusted target data that was previously set from database lookups. Because flask.request.get_json is called with force=True, this works regardless of Content-Type or HTTP method. Any authenticated user can inject arbitrary policy target attributes (e.g., user_id, project_id) into the request body to bypass RBAC checks and perform unauthorized operations on resources belonging to other users or projects. This was introduced in commit 5ea59f52 (Rocky/14.0.0).
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+deb11u3	vulnerable
	bookworm, bookworm (security)	2:22.0.2-0+deb12u1	vulnerable
	trixie (security), trixie	2:27.0.0-3+deb13u1	vulnerable
	forky	2:29.0.1-1	vulnerable
	sid	2:29.0.1-2	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
keystone	source	(unstable)	2:29.0.1-2

https://bugs.launchpad.net/keystone/+bug/2148398
https://security.openstack.org/ossa/OSSA-2026-015.html