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{"timestamp":"2026-07-14T14:26:36.589186Z","id":"CVE-2026-56451","options":[{"exploitation":"none"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}

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.

AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CWE-347

https://cert-portal.siemens.com/productcert/html/ssa-096828.html

[{"vendor":"Siemens","product":"Opcenter X","defaultStatus":"unknown","versions":[{"version":"0","lessThan":"V2604","versionType":"custom","status":"affected"}]}]