Vulnerability · CVE-2026-43001
An issue was discovered in OpenStack Keystone before 29.0.2.
Published May 1, 2026 · catalog updated Aug 14, 2026 · An issue was discovered
Check if you run it
No confirmed exploitation is on record for CVE-2026-43001. EPSS is 0.59%. Act only if a listed version of An issue was discovered is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (An issue was discovered).
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High8.0
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.59%
- Remediation
- Advisory link
- Affected products
- cpe openstack/keystone
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- cpe openstack/keystoneversion unspecified
How to fix CVE-2026-43001
Recommended remediation
A patch or advisory reference is linked. Open the original publisher for availability by product version.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-43001. EPSS is 0.59%. Act only if a listed version of An issue was discovered is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-1288; CWE-863: Incorrect Authorization. EPSS 0.59%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
May 1, 2026 · NIST NVD
Detected
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 w
Aug 14, 2026 · NIST NVD
Updated
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 w
Sources
- CVE.orgVulnerability recordCVE-2026-43001
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-43001
30-day exploitation probability 0.6%
first.org - NIST NVDVulnerability recordCVE-2026-43001
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 app
nvd.nist.gov
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.