CVE-2026-43001 OpenStack Keystone has an Incorrect Authorization Issue
Attackers with application credentials can create EC2 credentials for other projects, enabling cross-project lateral movement and unauthorized token issuance.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-43001?
CVE-2026-43001 is a high-severity missing authorization vulnerability in OpenStack Keystone, published on 1 May 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
An issue was discovered in OpenStack Keystone before 29.0.2. POST /v3/credentials did not validate that the caller-supplied project_id for an EC2-type credential matched the project of the authenticating application credential. This allowed an attacker holding an unrestricted application credential for project A to create an EC2 credential targeting project B; a subsequent /v3/ec2tokens exchange would then issue a Keystone token scoped to project B while still carrying the original app_cred_id, enabling cross-project lateral movement within the credential owner's role footprint.
Which versions are affected by CVE-2026-43001?
3 open source packages ship an affected version, including keystone. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
keystone PyPI | From 13.0.0 to 29.0.1 | None |
keystone PyPI | From 13.0.0 to 29.0.1 | None |
keystone PyPI | From 14.0.0 | 27.0.2, 28.0.2, 29.0.2 |
Products include Openstack Keystone.
How do I fix CVE-2026-43001?
Upgrade keystone to a fixed version for your release line: 27.0.2, 28.0.2 or 29.0.2.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-43001 being exploited?
There is no known exploitation of CVE-2026-43001 in the wild and no public exploit code.
Other vulnerabilities in OpenStack Keystone
- CVE-2020-12690 Insufficient Session Expiration in OpenStack Keystone
- CVE-2019-19687 OpenStack Keystone Credential Leakage
- CVE-2014-2828 OpenStack Identity (Keystone) DoS through V3 API authentication chaining
- CVE-2021-38155 OpenStack Keystone allows information disclosure during account locking
- CVE-2015-7546 OpenStack Identity Keystone and keystonemiddleware Insufficiently Protected Credentials
Sources
Also known as DEBIAN-CVE-2026-43001, GHSA-hhq2-3832-xxcv, PYSEC-2026-602.