CVE-2026-18499

HIGH CVSS 3.1: 8.1 EPSS 0.27%
Updated Aug 17, 2026
IBM
Parameter Value
CVSS 8.1 (HIGH)
Affected Versions 17.0.0.3 — 26.0.0.9
Fixed In 26.0.0.9
Type CWE-285 (Improper Authorization)
Vendor IBM
Public PoC No

IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 is vulnerable to a privilege escalation when using Liberty collectives.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
None
No disruption

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Ibm Websphere_Application_Server
cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:*
17.0.0.3 26.0.0.9