CVE-2025-65073

openstack-keystone: OpenStack Keystone: Unauthorized access and privilege escalation via AWS signature validation flaw

Published Nov 17, 2025 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
Description
OpenStack Keystone before 26.0.1, 27.0.0, and 28.0.0 allows a /v3/ec2tokens or /v3/s3tokens request with a valid AWS Signature to provide Keystone authorization.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-hcqg-5g63-7j9h OpenStack Keystone allows /v3/ec2tokens or /v3/s3tokens request with valid AWS Signature to provide Keystone authorization.
History
Type Values Removed Values Added
Title openstack-keystone: OpenStack Keystone: Unauthorized access and privilege escalation via AWS signature validation flaw
References
Metrics threat_severity

None

threat_severity

Important

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
CPEs cpe:2.3:a:openstack:keystone:*:*:*:*:*:*:*:*
Type Values Removed Values Added
First Time appeared Openstack
Openstack keystone
Vendors & Products Openstack
Openstack keystone
Type Values Removed Values Added
Weaknesses CWE-863
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N'}

Type Values Removed Values Added
Description OpenStack Keystone before 26.0.1, 27.0.0, and 28.0.0 allows a /v3/ec2tokens or /v3/s3tokens request with a valid AWS Signature to provide Keystone authorization.
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Nov 17, 2025, 11:04 PM
Reserved
Nov 17, 2025, 12:00 AM
Status
Deferred
Published
Nov 17, 2025, 8:16 AM
Modified
Oct 18, 2026, 8:10 PM
Severity
Important
Public date
Nov 17, 2025, 12:00 AM