CVE-2026-9330

Name: CVE-2026-9330
Creator: NVD / NIST
Published: 2026-06-01T19:16:55.813+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.5/10EPSS 0.47%

Last modified Jun 17, 2026

CVE-2026-9330 is a high-severity vulnerability rated 8.5/10 on the CVSS scale. 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.. EPSS estimates a 0.47% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.5/10

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

EPSS Probability

0.47%

37.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-502

Affected Software

Vendor	Product	Versions
Ibm	Websphere Application Server	>= 8.5.0.0, < 8.5.5.30
Ibm	Websphere Application Server	>= 9.0.0.0, < 9.0.5.29

References

https://www.ibm.com/support/pages/node/7274733Vendor Advisory

Timeline

Published: Jun 1, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-9330?

How severe is CVE-2026-9330?

CVE-2026-9330 has a CVSS score of 8.5/10 (HIGH severity). The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.

How do I fix CVE-2026-9330?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-9330?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST