Access Control Bypass Affecting keystone package, versions [0,29.0.0.0rc1)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-KEYSTONE-14038400
- published17 Nov 2025
- disclosed17 Nov 2025
- creditkay
Introduced: 17 Nov 2025
CVE-2025-65073 (opens in a new tab)How to fix?
Upgrade keystone to version 29.0.0.0rc1 or higher.
Overview
keystone is a package that provides authentication, authorization and service discovery mechanisms via HTTP primarily for use by projects in the OpenStack family.
Affected versions of this package are vulnerable to Access Control Bypass via the ec2tokens or s3tokens process when a request with a valid AWS Signature is accepted for authorization. An attacker can gain unauthorized access by submitting specially crafted requests containing valid AWS Signatures.