Vulnerability · Published Sep 18, 2026 · Assigned by ibm
CVE-2026-11549IBM WebSphere Application Server and IBM WebSphere Application Server - Liberty Improper Access Control
Medium 6.5
In plain English
A medium-severity improper access control in WebSphere Application Server 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 26% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 74.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
IBM WebSphere Application Server 8.5 and 9.0, and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 are affected by a virtual host bypass vulnerability.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| IBM | WebSphere Application Server | 9.08.5 |
| IBM | WebSphere Application Server - Liberty | 17.0.0.3 – through 26.0.0.5 |
Weakness: CWE-284 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
References
- https://www.ibm.com/support/pages/node/7286610 vendor-advisory, patch
- https://www.ibm.com/support/pages/node/7286611 vendor-advisory, patch