CVE-2025-65073 OpenStack Keystone allows /v3/ec2tokens or /v3/s3tokens request with valid AWS Signature to provide Keystone authorization.
Attackers can bypass Keystone authorization using valid AWS signatures on EC2/S3 token endpoints, gaining unauthorized access to OpenStack resources.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-65073?
CVE-2025-65073 is a high-severity authentication bypass vulnerability in OpenStack Keystone, published on 17 Nov 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-863
Which versions are affected by CVE-2025-65073?
7 open source packages ship an affected version, including keystone.
| Package | Affected | Fixed in |
|---|---|---|
keystone PyPI | All versions | 26.0.1, 27.0.0, 28.0.0 |
keystone PyPI | All versions | 26.0.1 |
keystone PyPI | All versions | 26.0.1 |
keystone PyPI | From 27.0.0.0rc1 | 27.0.0 |
keystone PyPI | From 27.0.0.0rc1 | 27.0.0 |
keystone PyPI | From 28.0.0.0rc1 | 28.0.0 |
1 more packages
keystone PyPI | From 28.0.0.0rc1 | 28.0.0 |
Linux distribution packages (2)
openstack-keystone Red Hat:openstack:18.0::el9 | All versions | 1:23.0.3-18.0.20241202141842.9e3dfb4.el9ost |
python3-keystone Red Hat:openstack:18.0::el9 | All versions | 1:23.0.3-18.0.20241202141842.9e3dfb4.el9ost |
How do I fix CVE-2025-65073?
Upgrade keystone to a fixed version for your release line: 26.0.1, 27.0.0 or 28.0.0.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2025-65073 being exploited?
There is no known exploitation of CVE-2025-65073 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2025-65073, DLA-4367-1, DSA-6056-1, GHSA-hcqg-5g63-7j9h, PYSEC-2026-1490, RHSA-2026:1958 and 2 more.