CVE-2026-9330

8.5 highEPSS 0.5%

High (8.5) in ibm websphere application server. EPSS 0.5% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

8.5 high

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

EPSS: 0.5% chance of exploitation in the next 30 days; higher than 43% of CVEs (scores of 2026-10-31)
CWE: CWE-502
Published: 2026-06-01
Modified: 2026-07-22
Record from: the NVD, synced 2026-10-19

Affected

ibm:websphere_application_server

References

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

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