CVE-2026-9330CWE-502

IBM WebSphere Application Server is affected by remote code execution

High · published June 1, 2026

CVSS v3.1
8.5
EPSS
1%
Percentile
51.6
In the wild
Unconfirmed
What it is

IBM WebSphere Application Server 9.0, and 8.5 is affected by an improper validation of user-supplied data during deserialization using the SAML Web Single Sign-On component. This could result in remote code execution via a crafted HTTP request when combined with a suitable gadget chain.

The record
Technical detail
CVSS v3.1
8.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00675 · 51.6th percentile
Weakness
CWE-502 · Deserialization of Untrusted Data
Published
2026-06-01T18:01Z
EPSS history
Timeline
  • 01 JUN 18:01Z
    IBM WebSphere Application Server is affected by remote code execution
    cvelistv5