Sources: National Vulnerability Database, CVE.org, CISA KEV, FIRST EPSS
CVE-2026-123628 Overview
IBM webMethods Integration Server 10.15 and 11.1 could allow a remote attacker to obtain sensitive information due to an exposure of sensitive server-side environment variables and Java runtime details.
Critical Impact
Affected Products
- IBM webMethods Integration Server: see the vendor advisory for the exact affected versions
Discovery Timeline
- 2026-11-13: CVE-2026-123628 published to the National Vulnerability Database by psirt@us.ibm.com
- 2026-11-13: last updated in the NVD database
Technical Details for CVE-2026-123628
Vulnerability Analysis
CVE-2026-123628 is a Information Exposure weakness (CWE-200: Information Exposure) in IBM webMethods Integration Server. Based on its CVSS vector, the flaw can be reached over the network, needs no login, and needs no user interaction. Sensitive information is shown to someone who should not see it.
With a CVSS base score of 7.5, apply the vendor fix and confirm exposure on internet facing and business critical assets first.
Root Cause
The weakness is classified as CWE-200: Information Exposure. Sensitive information is shown to someone who should not see it.
Attack Vector
Based on the CVSS vector, the flaw can be reached over the network, needs no login, 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:N/UI:N/S:U/C:H/I:N/A:N
Detection Methods for CVE-2026-123628
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-2026-123628
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
- CWE-200: Information Exposure More CVEs with this weakness
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
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