CVE-2026-9330

HIGH

IBM WebSphere Application Server 8.5 and 9.0 - Remote Code Execution via SAML Web SSO Deserialization

Title source: llm
STIX 2.1

Description

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.

References (1)

Core 1
Core References
Various Sources vendor-advisory patch
https://www.ibm.com/support/pages/node/7274733

Scores

CVSS v3 8.5
EPSS 0.0038
EPSS Percentile 29.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-502
Status published
Products (3)
IBM/WebSphere Application Server 8.5
IBM/WebSphere Application Server 9.0 - 1.1.9.12
ibm/websphere_application_server 8.5.0.0 - 8.5.5.30
Published Jun 01, 2026
Tracked Since Jun 02, 2026