Vulnerability · Published Apr 10, 2026 · Assigned by mitre
CVE-2026-33551
Low 3.5
In plain English
A low-severity incorrect authorization in Keystone from OpenStack. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | keystone | 2:22.0.2-0+deb12u2 | DEBIAN-CVE-2026-33551 |
| Debian:13 | keystone | 2:27.0.0-3+deb13u3 | DEBIAN-CVE-2026-33551 |
| Debian:14 | keystone | 2:29.0.0-2 | DEBIAN-CVE-2026-33551 |
| PyPI | keystone | 26.1.1 | GHSA-4phw-6824-6cfp |
| PyPI | keystone | 26.1.1 | PYSEC-2026-202 |
| Ubuntu:22.04:LTS | keystone | 2:21.0.1-0ubuntu2.4 | UBUNTU-CVE-2026-33551 |
| Ubuntu:24.04:LTS | keystone | 2:25.0.0-0ubuntu1.4 | UBUNTU-CVE-2026-33551 |
| Ubuntu:25.10 | keystone | 2:28.0.0-0ubuntu1.3 | UBUNTU-CVE-2026-33551 |
| Ubuntu:26.04:LTS | keystone | 2:29.0.0-0ubuntu1.2 | UBUNTU-CVE-2026-33551 |
Affected products (as reported)
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N