EUVD-2026-90972
GHSA-xfh5-8fx4-3crm
Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
Network-facing and pre-auth (AV:N/PR:N) since the cert is parsed during authentication, but AC:H because CRL distribution point checking must be enabled; partial file read (C:L) and crash via memory exhaustion (A:H).
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
Lifecycle Timeline
3DescriptionCVE.org
A flaw was found in the X.509 client certificate authenticator of Keycloak. When CRL Distribution Point checking is enabled, the server fails to properly validate the file paths provided in a client certificate. An attacker can provide a specially crafted certificate that causes the server to attempt to read sensitive files from the local system or exhaust memory by loading extremely large files, potentially leading to information disclosure or a system crash.
AnalysisAI
Information disclosure and denial of service in Keycloak's X.509 client certificate authenticator occur when CRL Distribution Point checking is enabled and an unauthenticated remote attacker submits a crafted client certificate. The server fails to properly validate file paths from the certificate, allowing limited local file reads and extreme memory consumption that can crash the system; exploitation requires the non-default combination of certificate-based client authentication and CRL checking, and no public exploit was identified at time of analysis.
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the Keycloak X.509 client certificate authenticator to be in use AND CRL Distribution Point checking to be enabled - this is a non-default authentication configuration, not the out-of-the-box setup. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a moderate-priority issue whose real-world risk is tightly bounded by a non-default configuration rather than by raw severity. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | No vendor-released patch was identified in the provided intelligence at time of analysis. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
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Same weakness CWE-22 – Path Traversal
View allSame technique Information Disclosure
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External POC / Exploit Code
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