Improper Removal of Sensitive Information Before Storage or Transfer in Keycloak - CVE-2026-16104
Published: July 17, 2026 / Updated: September 5, 2026
Vulnerability identifier: #VU146970
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-16104
CWE-ID: CWE-212
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose third-party service credentials.
The vulnerability exists due to improper removal of sensitive information before transfer in the authentication configuration endpoint of the keycloak-services component when handling requests for configuration values. A remote user can request authentication configuration values to disclose third-party service credentials.
Exploitation requires an administrator account with view-only permissions, and exposed values may include reCAPTCHA secret keys.
Affected software
Keycloak
How to mitigate CVE-2026-16104
Install security update from vendor's website.
Keycloak - update to 26.7.3