---
id: CVE-2025-65073
aliases:
  - GHSA-hcqg-5g63-7j9h
  - PYSEC-2026-1490
title: >-
  OpenStack Keystone allows /v3/ec2tokens or /v3/s3tokens request with valid AWS
  Signature to provide Keystone authorization.
summary: >-
  OpenStack Keystone allows /v3/ec2tokens or /v3/s3tokens request with valid AWS
  Signature to provide Keystone authorization.
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:N'
vendor: keystone
product: keystone
ecosystem: pip
affected:
  - keystone < 26.0.1
  - 'keystone >= 27.0.0.0rc1, < 27.0.0'
  - 'keystone >= 28.0.0.0rc1, < 28.0.0'
patched:
  - keystone 26.0.1
  - keystone 27.0.0
  - keystone 28.0.0
published: '2025-11-17'
updated: '2026-07-07'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-hcqg-5g63-7j9h'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2025-65073'
  - url: 'https://github.com/openstack/keystone'
  - url: 'https://www.openwall.com/lists/oss-security/2025/11/04/2'
  - url: 'http://www.openwall.com/lists/oss-security/2025/11/17/6'
tags:
  - osv
  - pip
epss: 0.00226
epssPercentile: 0.11953
ingestedAt: '2026-07-08T18:25:50.052Z'
---

## Overview

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.

## Affected packages

- `keystone < 26.0.1`
- `keystone >= 27.0.0.0rc1, < 27.0.0`
- `keystone >= 28.0.0.0rc1, < 28.0.0`

## Remediation

Upgrade to a patched release:

- `keystone 26.0.1`
- `keystone 27.0.0`
- `keystone 28.0.0`