CVE-2026-9330

IBM WebSphere Application Server is affected by remote code execution

At a glance

Severity: HIGH 8.5
EPSS: EPSS 0.52 % · percentile 44 (2026-10-27)
State: PUBLISHED
Published: 2026-06-01
Updated: 2026-06-02
Assigner: ibm
NVD status: Analyzed

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 8.5	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H	ibm
CVSS 3.1	HIGH 8.5	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H	NVD · psirt@us.ibm.com (Secondary)

Weaknesses (CWE)

CWE-502

European references

ENISA EUVD · EUVD-2026-33740
GCVE · GCVE-0-2026-9330

CERT-FR advisories

CERTFR-2026-AVI-0788 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2026-AVI-0748 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2026-AVI-0698 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr

Affected configurations (NVD CPE)

cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:traditional:*:*:* ≥ 8.5.0.0 < 8.5.5.30
cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:traditional:*:*:* ≥ 9.0.0.0 < 9.0.5.29

Affected products

Product	Versions
IBM · WebSphere Application Server	affected 9.0 ≤ 1.1.9.12 ; affected 8.5

References

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

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD