Vulnerability · Published May 26, 2026 · Assigned by ibm
CVE-2026-8620IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities when using when using Web Server Plug-ins
High 7.5
In plain English
A high-severity security flaw in Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.3%top 79.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty 8.5, 9.0 IBM WebSphere Application Server and WebSphere Application Server Liberty are vulnerable to HTTP request smuggling in the Web Server Plug-ins through a specially crafted request.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| IBM | Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty | 8.5, 9.0 – through Interim Fix 002 |
Weakness: CWE-444 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N
References
- https://www.ibm.com/support/pages/node/7274072 vendor-advisory, patch