An issue was discovered in OpenStack Keystone 14 through 26 before 26.1.1, 27.0.0, 28.0.0, and 29.0.0. Restricted application credentials can create EC2 credentials. By using a restricted application credential to call the EC2 credential creation API, an authenticated user with only a reader role may obtain an EC2/S3 credential that carries the full set of the parent user's S3 permissions, effectively bypassing the role restrictions imposed on the application credential. Only deployments that use restricted application credentials in combination with the EC2/S3 compatibility API (swift3 / s3api) are affected.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://security.openstack.org/ossa/OSSA-2026-005.html Patch, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/04/07/12 Mailing List, Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.3 · openstackNVD modified 2026-10-26 22:10
Affected (CPE criteria) 4
cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*cpe:2.3:a:openstack:keystone:27.0.0:*:*:*:*:*:*:*cpe:2.3:a:openstack:keystone:28.0.0:*:*:*:*:*:*:*cpe:2.3:a:openstack:keystone:29.0.0:*:*:*:*:*:*:*
References 4
- https://bugs.launchpad.net/keystone/+bug/2142138 Exploit, Issue Tracking
- https://security.openstack.org/ossa/OSSA-2026-005.html Patch, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/04/07/12 Mailing List, Patch, Third Party Advisory
- https://bugs.launchpad.net/keystone/+bug/2142138 Exploit, Issue Tracking