6.5Medium

CVE-2026-11549IBM WebSphere Application Server and IBM WebSphere Application Server - Liberty Improper Access Control

IBM WebSphere Application Server; IBM WebSphere Application Server - Liberty Published: 2026-09-18 22:06 (1 month ago)

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.

Weakness (CWE): CWE-284

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
IBM	WebSphere Application Server	9.0, 8.5
IBM	WebSphere Application Server - Liberty	17.0.0.3 – ≤ 26.0.0.5

References and patches

https://www.ibm.com/support/pages/node/7286610 vendor-advisorypatch
https://www.ibm.com/support/pages/node/7286611 vendor-advisorypatch

CVSS score

6.5Medium

Source: ibm · CVSS 3.1

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: Low
Availability: None

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

All scores (2)

cna	CVSS 3.1	6.5Medium
psirt@us.ibm.com	CVSS 3.1	6.5Medium

EPSS (chance of exploitation in 30 days)

0.33%

higher than 26% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: yes
Technical impact: partial

Timeline

ID reserved2026-06-08
Published2026-09-18 22:06
Reached IP-DB2026-10-24 23:42
Last updated2026-10-22 22:17

Assigned by (CNA): ibm
NVD status: Awaiting Analysis

View at source: CVE.org · NVD

Get told when these products get a new vulnerability

Turn on email alerts

Free · with an account · switch off any time