PT-2026-36306 · Openstack · Openstack Keystone

Tim Shephard · Published 2026-05-01 · Updated 2026-05-01 · CVE-2026-43001

Positive Technologies (AI Summary)

CVSS v3.1

8.0

High

Base vector

AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions OpenStack Keystone versions 13 through 29

Description An issue exists where the 'POST /v3/credentials' endpoint fails to validate that the project id provided by the caller for an EC2-type credential matches the project of the authenticating application credential. This allows an attacker with an unrestricted application credential for one project to create an EC2 credential targeting a different project. A subsequent exchange via '/v3/ec2tokens' can then issue a Keystone token scoped to the target project while retaining the original app cred id, enabling cross-project lateral movement within the role footprint of the credential owner.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-43001

GHSA-HHQ2-3832-XXCV

Affected Products

Openstack Keystone

References · 16

• 🔥 https://bugs.launchpad.net/keystone/+bug/2149775 · Exploit
• https://osv.dev/vulnerability/GHSA-hhq2-3832-xxcv · Vendor Advisory
• https://security.openstack.org/ossa/OSSA-2026-015.html · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-43001 · Security Note
• https://review.opendev.org/c/openstack/keystone/+/985804 · Patch
• https://cve.org/CVERecord?id=CVE-2026-43001 · Security Note
• https://ubuntu.com/security/CVE-2026-43001 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-43001 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-43001 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-43001 · Vendor Advisory
• https://t.me/CVEtracker/52399 · Telegram Post
• https://twitter.com/infoflowcloud/status/2050144790654689705 · Twitter Post
• https://twitter.com/VulmonFeeds/status/2050166773199069198 · Twitter Post
• https://t.me/cveNotify/161703 · Telegram Post
• https://twitter.com/CVEnew/status/2050144038117150754 · Twitter Post