CVE-2026-43001

Affected: OpenStack Keystone, Red Hat OpenStack Services on OpenShift 18.0, Red Hat OpenStack Platform 13 (Queens), Red Hat OpenStack Platform 16.2, Red Hat OpenStack Platform 17.1, Red Hat OpenStack Platform 18.0

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.

USN-8433-1 — keystone vulnerabilities

Affected: Ubuntu:22.04:LTS: keystone, Ubuntu:24.04:LTS: keystone, Ubuntu:25.10: keystone, Ubuntu:26.04:LTS: keystone

It was discovered that OpenStack Keystone allowed restricted application credentials to create EC2 credentials. An authenticated attacker with only a reader role could possibly use this issue to bypass the role restrictions imposed on the application credential. (CVE-2026-33551)

It was discovered that the OpenStack Keystone LDAP identity backend did not correctly convert the user enabled attribute to a boolean value. An attacker could possibly use this issue to authenticate as a user disabled in LDAP. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, and Ubuntu 25.10. (CVE-2026-40683)

It was discovered that OpenStack Keystone's application credential authentication plugin did not verify that the user supplied in an authentication request matched the credential owner. An authenticated attacker could possibly impersonate another user and gain access to their tokens and credentials. (CVE-2026-42998)

It was discovered that OpenStack Keystone's RBAC policy enforcer unconditionally merged the raw JSON request body into the policy enforcement dictionary, overwriting trusted target data. An authenticated attacker could possibly use this issue to inject arbitrary policy attributes to bypass RBAC checks. (CVE-2026-42999)

It was discovered that OpenStack Keystone allowed an attacker with the member role to escalate privileges to admin by chaining application credential impersonation with Keystone trusts. An attacker could possibly use this issue to create a persistent tr…

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CVE-2026-43001

USN-8433-1 — keystone vulnerabilities