CVE-2026-33551
Last modified
CVE-2026-33551 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. 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. EPSS estimates a 0.22% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Openstack | Keystone | >= 14.0.0, < 26.1.1 |
| Openstack | Keystone | 27.0.0 |
| Openstack | Keystone | 28.0.0 |
| Openstack | Keystone | 29.0.0 |
References
- https://bugs.launchpad.net/keystone/+bug/2142138Exploit, Issue Tracking
- https://security.openstack.org/ossa/OSSA-2026-005.htmlPatch, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/04/07/12Mailing List, Patch, Third Party Advisory
- https://bugs.launchpad.net/keystone/+bug/2142138Exploit, Issue Tracking
Timeline
- Published
- Last Modified
- Status
- Analyzed
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