VULNERABILITY INTELLIGENCE

CVE-2026-33551

CVSS score3.5 LOW

EPSS probability0.22%

CISA KEVNot currently listed

Published2026-04-10

Last modified2026-10-26

CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:N

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.

Weakness classification

CWE-863: Incorrect Authorization

Primary references

cve@mitre.org — Exploit, Issue Tracking
cve@mitre.org — Patch, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Patch, Third Party Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0 — Exploit, Issue Tracking