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CVE-2026-117545: IBM webMethods Integration Server Improper Authentication Vulnerability

CVE-2026-117545 explained: high Improper Authentication in IBM webMethods Integration Server. CVSS 8.8. Affected versions, detection, fixes and CTEM priority.

Last updated: Nov 8, 2026

CVSS
8.8 HIGH
EPSS
n/a
CISA KEV
Not listed
CWE
CWE-287

Sources: National Vulnerability Database, CVE.org, CISA KEV, FIRST EPSS

CVE-2026-117545 Overview

IBM webMethods Integration Server 12.1 could allow a remote authenticated attacker to bypass security restrictions due to improper authentication.

Critical Impact

Remote, authenticated attackers can exploit this Improper Authentication in IBM webMethods Integration Server. The CVSS base score is 8.8 (High).

Affected Products

  • IBM webMethods Integration Server: see the vendor advisory for the exact affected versions

Discovery Timeline

  • 2026-11-08: CVE-2026-117545 published to the National Vulnerability Database by psirt@us.ibm.com
  • 2026-11-08: last updated in the NVD database

Technical Details for CVE-2026-117545

Vulnerability Analysis

CVE-2026-117545 is a Improper Authentication weakness (CWE-287: Improper Authentication) in IBM webMethods Integration Server. Based on its CVSS vector, the flaw can be reached over the network, needs some level of access, and needs no user interaction. The software does not properly prove who a user is.

With a CVSS base score of 8.8, apply the vendor fix and confirm exposure on internet facing and business critical assets first.

Root Cause

The weakness is classified as CWE-287: Improper Authentication. The software does not properly prove who a user is.

Attack Vector

Based on the CVSS vector, the flaw can be reached over the network, needs some level of access, and needs no user interaction. Attack complexity is low complexity.

No exploitation in the wild is confirmed by CISA at the time of the last update. Check the references below for any vendor or researcher proof of concept.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Detection Methods for CVE-2026-117545

Detection Strategies

  • Inventory every instance of IBM webMethods Integration Server and compare the running version with the affected range above.
  • Check external attack surface scans for internet facing instances of the component.
  • Run an authenticated vulnerability scan once your scanner ships a check for this CVE.

Monitoring Recommendations

  • Forward IBM webMethods Integration Server application, access and audit logs to your SIEM for retrospective hunting.
  • Alert on new processes, configuration changes or outbound connections from the affected service.
  • Track the vendor advisory and the CISA KEV catalog for changes in exploitation status.

How to Mitigate CVE-2026-117545

Immediate Actions Required

  • Apply the fixed version of IBM webMethods Integration Server named in the vendor advisory.
  • Prioritize internet facing and business critical instances first.
  • Rescan after the change to confirm the exposure is closed.

Patch Information

Use the fixed version listed in the vendor advisory for IBM webMethods Integration Server.

Workarounds

  • If patching must wait, restrict network access to the affected service and place it behind authentication or a web application firewall rule.

CWE References

Technical References

This entry is built directly from NVD, CISA KEV and EPSS data. Verify fixed versions in the vendor advisory before you deploy.

Frequently asked questions

CVE-2026-117545 is a high severity Improper Authentication in IBM webMethods Integration Server with a CVSS score of 8.8. Apply the vendor fix and confirm exposure on internet facing and business critical assets first.

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