{"id":"CVE-2026-43001","aliases":["GHSA-hhq2-3832-xxcv","PYSEC-2026-602"],"url":"https://o3.security/vulnerability/CVE-2026-43001","summary":"OpenStack Keystone has an Incorrect Authorization Issue","details":"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.","published":"2026-05-01T00:00:00Z","modified":"2026-08-16T03:30:55.049813938Z","cvss":{"score":7.9,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L"},"epss":{"score":0.00466,"percentile":0.3941,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"keystone","fixedVersion":null}],"fix":null,"references":[{"type":"WEB","url":"https://bugs.launchpad.net/keystone/+bug/2149775"},{"type":"WEB","url":"https://review.opendev.org/c/openstack/keystone/+/985804"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43001.json"},{"type":"WEB","url":"https://security.openstack.org/ossa/OSSA-2026-015.html"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:39808"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:54757"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-43001"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43001.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43001"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2464305"},{"type":"PACKAGE","url":"https://review.opendev.org/c/openstack/keystone"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-16T03:30:55.049813938Z"}}