CVE-2026-33551
OpenStack Keystone: Restricted application credentials can create EC2 credentials
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.
How to fix CVE-2026-33551
To remediate CVE-2026-33551, upgrade the affected package to a fixed version below.
- —no fix listed
- —upgrade to 26.1.1 or later
- —upgrade to 26.1.1 or later
Is CVE-2026-33551 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0
- >= 14.0.0, < 26.1.1
- >= 14.0.0, < 26.1.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | LOW3.5 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N |