SSA-096828

Vulnerability from csaf_siemens - Published: 2026-07-14 00:00 - Updated: 2026-07-14 00:00
Summary
SSA-096828: Token Invalidation Vulnerability in Opcenter X Before V2604
Notes
Summary: Opcenter X before V2604 contain an authentication bypass vulnerability that could allow an attacker to gain full unauthorized access to the application. Siemens has released a new version for Opcenter X and recommends to update to the latest version.
General Recommendations: As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals. Additional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity
Additional Resources: For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT: https://www.siemens.com/cert/advisories
Terms of Use: The use of Siemens Security Advisories is subject to the terms and conditions listed on: https://www.siemens.com/productcert/terms-of-use.
CVE-2026-56451

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.

10.0 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CWE-347 - Improper Verification of Cryptographic Signature
Affected products
Product Identifier Version Remediation
Opcenter X < V2604
Siemens / Opcenter X
 vers:intdot/<2604
Vendor Fix fix
References
To clipboard 

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    "distribution": {
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        "text": "Opcenter X before V2604 contain an authentication bypass vulnerability that could allow an attacker to gain full unauthorized access to the application.\n\nSiemens has released a new version for Opcenter X and recommends to update to the latest version.",
        "title": "Summary"
      },
      {
        "category": "general",
        "text": "As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens\u0027 operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.\nAdditional information on Industrial Security by Siemens can be found at: https://www.siemens.com/industrialsecurity",
        "title": "General Recommendations"
      },
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        "title": "Additional Resources"
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    "publisher": {
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    "references": [
      {
        "category": "self",
        "summary": "SSA-096828: Token Invalidation Vulnerability in Opcenter X Before V2604 - HTML Version",
        "url": "https://cert-portal.siemens.com/productcert/html/ssa-096828.html"
      },
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        "category": "self",
        "summary": "SSA-096828: Token Invalidation Vulnerability in Opcenter X Before V2604 - CSAF Version",
        "url": "https://cert-portal.siemens.com/productcert/csaf/ssa-096828.json"
      }
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    "title": "SSA-096828: Token Invalidation Vulnerability in Opcenter X Before V2604",
    "tracking": {
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      "status": "interim",
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  "product_tree": {
    "branches": [
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                "name": "vers:intdot/\u003c2604",
                "product": {
                  "name": "Opcenter X \u003c V2604",
                  "product_id": "1"
                }
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  "vulnerabilities": [
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      "cve": "CVE-2026-56451",
      "cwe": {
        "id": "CWE-347",
        "name": "Improper Verification of Cryptographic Signature"
      },
      "notes": [
        {
          "category": "description",
          "text": "Affected applications do not properly validate the algorithm specified in the JSON Web Token (JWT) header.\r\nThis 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.",
          "title": "CVE Description"
        }
      ],
      "product_status": {
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        ]
      },
      "remediations": [
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          "category": "vendor_fix",
          "details": "Update to V2604 or later version",
          "product_ids": [
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          ],
          "url": "https://support.sw.siemens.com/product/206159703/"
        }
      ],
      "scores": [
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          "cvss_v3": {
            "baseScore": 10.0,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "products": [
            "1"
          ]
        }
      ],
      "title": "CVE-2026-56451"
    }
  ]
}



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