Critical severity10.0NVD Advisory· Published Jul 14, 2026· Updated Jul 15, 2026
CVE-2026-56451
CVE-2026-56451
Description
A vulnerability has been identified in Opcenter X (All versions < V2604). Affected applications do not properly validate the algorithm specified in the JSON Web Token (JWT) header. This could allow an unauthenticated remote attacker to forge arbitrary JWT, bypass authentication mechanisms and impersonate any user including administrative accounts, potentially gaining full unauthorized access to the application.
Patches
Vulnerability mechanics
References
1News mentions
1- Siemens Opcenter XCISA Alerts