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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.

PUBLISHED Reserved 2026-06-22 | Published 2026-07-14 | Updated 2026-07-14 | Assigner siemens




CRITICAL: 10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CRITICAL: 10.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:H/SA:H

Problem types

CWE-347: Improper Verification of Cryptographic Signature

Product status

Default status
unknown

Any version before V2604
affected

References

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

cve.org (CVE-2026-56451)

nvd.nist.gov (CVE-2026-56451)

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