CVE-2026-103884
Medium
Description
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.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Red Hat Build of Keycloak
PublishedOct 1, 2026
First seenOct 1, 2026
Weakness typeCWE-22Path traversal
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Red Hat Build of Keycloak | No range specified | — |
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