OpenStack Keystone Vulnerability in Authentication Mechanism
CVE-2025-65073

7.5HIGH

Key Information:

Vendor

Openstack
Status
Keystone
Vendor
CVE Published:
17 November 2025

What is CVE-2025-65073?

The OpenStack Keystone service prior to specified versions contains a security issue that allows an attacker to use a valid AWS Signature in requests to /v3/ec2tokens or /v3/s3tokens endpoints. This flaw can enable unauthorized Keystone authorization, potentially impacting the integrity of user sessions within OpenStack environments.

Affected Version(s)

Keystone 0 < 26.0.1

Keystone 27.0.0

Keystone 28.0.0

References

https://www.openwall.com/lists/oss-security/2025/11/04/2

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
Low
Integrity:
High
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

JSON
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CVE-2025-65073 : OpenStack Keystone Vulnerability in Authentication Mechanism