CVE-2026-11538 PUBLISHED

IBM WebSphere Application Server prior to 9.0.5.29 and 8.5.5.31 are affected by multiple vulnerabilities

Assigner: ibm
Reserved: 08.06.2026 Published: 18.09.2026 Updated: 18.09.2026

IBM WebSphere Application Server 9.0 and 8.5 is affected by a log injection vulnerability through crafted LTPA token cookies.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS Score: 3.7

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	Low
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	IBM
Product	WebSphere Application Server
Versions	Version 9.0 is affected Version 8.5 is affected

Solutions

IBM strongly recommends addressing the vulnerabilities now by applying the fix pack(s) listed below. For IBM WebSphere Application Server traditional: For V9.0.0.0 through 9.0.5.28: · Apply Fix Pack 9.0.5.29 (availability September 2026) or later fix pack. For V8.5.0.0 through 8.5.5.30: · Apply Fix Pack 8.5.5.31 (availability September 2026) or later fix pack.

References

https://www.ibm.com/support/pages/node/7286610

Problem Types

CWE-117 Improper Output Neutralization for Logs CWE