{"id":"CVE-2026-43001","details":"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.","aliases":["GHSA-hhq2-3832-xxcv","PYSEC-2026-602"],"modified":"2026-07-08T08:13:29.150699997Z","published":"2026-05-01T00:00:00Z","related":["CGA-px25-jx2m-rj34"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43001.json","unresolved_ranges":[{"extracted_events":[{"introduced":"14.0.0"},{"fixed":"27.0.2"},{"introduced":"28.0.0"},{"fixed":"28.0.2"},{"introduced":"29.0.0"},{"fixed":"29.0.2"}],"source":"AFFECTED_FIELD"},{"extracted_events":[{"introduced":"14.0.0"},{"fixed":"27.0.2"},{"introduced":"28.0.0"},{"fixed":"28.0.2"},{"introduced":"29.0.0"},{"fixed":"29.0.2"}],"source":"CPE_FIELD"},{"extracted_events":[{"fixed":"29.0.2"}],"source":"DESCRIPTION"}],"cwe_ids":["CWE-863"],"cna_assigner":"mitre"},"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/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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/openstack/keystone","events":[{"introduced":"c767e254979c96858a81cc4bbe8d9773d4dd539b"},{"fixed":"b896b71557ce8370c442fe05818a74d7a9a623a8"},{"introduced":"a568938e0c967a56ade269c93f42718008487b14"},{"fixed":"3dfbbe7b9bd11dcd64420da0e4eda48b637f4a70"},{"introduced":"3526925ae34a66e626bec985628a421a7694168e"},{"fixed":"7b9f39226744b8db50a6d702cc5f715fc9c17f37"}],"database_specific":{"extracted_events":[{"introduced":"14.0.0"},{"fixed":"27.0.2"},{"introduced":"28.0.0"},{"fixed":"28.0.2"},{"introduced":"29.0.0"},{"fixed":"29.0.2"}],"cpe":"cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*","source":"CPE_RANGE"}}],"versions":["29.0.1","28.0.1","29.0.0.0rc1","29.0.0","28.0.0.0rc1","28.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43001.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:L"}]}