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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.

PUBLISHED Reserved 2026-05-22 | Published 2026-06-01 | Updated 2026-06-02 | Assigner ibm




HIGH: 8.5CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Problem types

CWE-502 Deserialization of Untrusted Data

Product status

9.0 (semver)
affected

8.5
affected

References

www.ibm.com/support/pages/node/7274733 vendor-advisory patch

cve.org (CVE-2026-9330)

nvd.nist.gov (CVE-2026-9330)

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