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HIGH · 8.5

CVE-2026-9330

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 remot...

Vulnerability 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.

CVSS Score

8.5

HIGH

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
IbmWebsphere Application Server>= 8.5.0.0, < 8.5.5.30

Related Weaknesses (CWE)

CWE-502

References

FAQ

What is CVE-2026-9330?

CVE-2026-9330 is a vulnerability with a CVSS score of 8.5 (HIGH). 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 remot...

How severe is CVE-2026-9330?

CVE-2026-9330 has been rated HIGH with a CVSS base score of 8.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-9330?

Check the references section above for vendor advisories and patch information. Affected products include: Ibm Websphere Application Server.