CVE-2026-43001: openstack keystone Incorrect Authorization
Vulnerability summary
CVE-2026-43001 is a high (CVSS 8.0) Incorrect Authorization vulnerability in openstack keystone. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 40.4% of scored vulnerabilities. 1 public exploit is recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 3 · Related 2Timeline
- 01-05-2026PublishedVulnerability first disclosed.
- 14-08-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
6 scores · 6 sources · 1 version- CVE.orgCNA7.9HighCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:LDiffers
- OSV · PypiEcosystem advisory · calculated8.0HighCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated8.0HighCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.0HighCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
- OSV · ChainguardEcosystem advisory · calculated7.9HighCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:LDiffers
EPSS trend
Probability
0.47%
Chance of exploitation in the next 30 days
Percentile
40%
Versus all other CVEs
30-day change
Decrease -0.12 pp
From 0.59% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (bugs.launchpad.net)
Maturity: unknown
Weaknesses
CWE · root cause- CWE-863Incorrect AuthorizationThe product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
- CWE-1288Improper Validation of Consistency within InputThe product receives a complex input with multiple elements or fields that must be consistent with each other, but it does not validate or incorrectly validates that the input is actually consistent.
Affected systems
Known conditions: network-reachable, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Chainguard5 products
- openstack-keystone-2025.1< 27.0.1-r0
- openstack-keystone-2025.1-fips< 27.0.1_git20260601-r3
- openstack-keystone-2025.2< 28.0.1-r0
- openstack-keystone-2025.2-fips< 28.0.1_git20260603-r0 | < 28.0.1_git20260610-r1 | < 28.0.1_git20260610-r0 | < 28.0.1_git20260608-r1
- openstack-keystone-2026.1< 29.0.1-r0
Debian1 product
- keystone< 2:22.0.2-0+deb12u3 | < 2:27.0.0-3+deb13u4 | < 2:29.0.1-2
Openstack1 product
- keystone≥ 14.0.0, < 27.0.2 | ≥ 28.0.0, < 28.0.2 | ≥ 29.0.0, < 29.0.2
PyPI1 product
- keystone≥ 13.0.0, ≤ 29.0.1 | ≥ 29.0.0, < 29.0.2
Ubuntu1 product
- keystoneAll versions (No fix recorded) | < 2:21.0.1-0ubuntu2.4 | < 2:25.0.0-0ubuntu1.4 | < 2:28.0.0-0ubuntu1.3 | < 2:29.0.0-0ubuntu1.2
5 vendors · 9 products
