CVE-2026-22734: Cloud Foundry UAA SAML 2.0 Signature Bypass
Cloud Foundry UUA is vulnerable to a bypass that allows an attacker to obtain a token for any user and gain access to UAA-protected systems. This vulnerability exists when SAML 2.0 bearer assertions are enabled for a client, as the UAA accepts SAML 2.0 bearer assertions that are neither signed nor encrypted. This issue affects UUA from v77.30.0 to v78.7.0 (inclusive) and it affects CF Deployment from v48.7.0 to v54.14.0 (inclusive).
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-22734?
CVE-2026-22734 is classified as a high severity vulnerability due to its potential to allow unauthorized access to UAA-protected systems.
How do I fix CVE-2026-22734?
To mitigate CVE-2026-22734, disable SAML 2.0 bearer assertions for clients in your Cloud Foundry UAA configurations.
Which versions are affected by CVE-2026-22734?
CVE-2026-22734 affects Cloud Foundry UAA versions from 77.30.0 to 78.7.0 and CF Deployment versions from 48.7.0 to 54.14.0.
What impact does CVE-2026-22734 have on security?
CVE-2026-22734 allows an attacker to obtain a security token for any user, posing a significant risk to user data and system integrity.
Is there a workaround for CVE-2026-22734 if immediate patching isn't possible?
While the best approach is to patch, temporarily disabling SAML 2.0 bearer assertions can serve as a workaround until fully upgrading to safe versions.