CVE-2026-8646CWE-444

IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities

High · published June 22, 2026

CVSS v3.1
7.4
EPSS
1%
Percentile
47.4
In the wild
Unconfirmed
What it is

IBM WebSphere Application Server 9.0 and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are vulnerable to HTTP request smuggling. A remote attacker could smuggle a specially crafted request to the application server thereby allowing the attacker to bypass security controls, spoof identity, escalate privilege, and expose sensitive information.

The record
Technical detail
CVSS v3.1
7.4 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00588 · 47.4th percentile
Weakness
CWE-444 · Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Published
2026-06-22T14:44Z
EPSS history
Timeline
  • 22 JUN 14:44Z
    IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities
    cvelistv5