A flaw was found in the X.509 client certificate authenticator of Keycloak. (CVE-2026-103884)
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.
A flaw was found in the X.509 client certificate authenticator of Keycloak. (CVE-2026-103884)
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.
CVSS v3.1
Score 6.5medium
Weaknesses
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-xfh5-8fx4-3crm
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-103884"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 3.1
Threat ID: 6abeb3e1a43b0b3b89ecc97e
Added to database: 10/01/2026, 19:26:25 UTC
Last updated: 10/01/2026, 19:26:25 UTC
Views: 1
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