CVE-2026-43001
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.9epss 0.5%
exploitation probability
0.5%top 63% of all CVEs
observed exploitation
nono source reports it
An issue was discovered in OpenStack Keystone before 29.0.2. 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.
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L
Affected products
OpenStack · KeystoneReferences
https://access.redhat.com/errata/RHSA-2026:39808https://access.redhat.com/security/cve/CVE-2026-43001https://bugs.launchpad.net/keystone/+bug/2149775https://bugzilla.redhat.com/show_bug.cgi?id=2464305https://review.opendev.org/c/openstack/keystone/+/985804https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43001.jsonhttps://security.openstack.org/ossa/OSSA-2026-015.html