Improper Authentication in OpenID Connect Client - CVE-2026-118554
Published: October 29, 2026
Vulnerability identifier: #VU158356
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-118554
CWE-ID: CWE-287
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to unverified automatic account linking. A remote attacker can take over any existing Drupal account that has not yet been linked to an OpenID Connect user.
Affected software
OpenID Connect Client
How to mitigate CVE-2026-118554
Install updates from vendor's website.
OpenID Connect Client - update to 2.3.1