What is CVE-2026-9336?

CVE-2026-9336 is a medium-severity vulnerability in IBM Websphere Application Server, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-09-10.

How severe is CVE-2026-9336?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in IBM Websphere Application Server

CVE-2026-9336

IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to a denial of service, caused by sending a specially-crafted HTTP request to an administrative endpoint. A remote attacker could exploit this vulnerability to cause the server to exhaust filesystem space.

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Ibm Websphere Application Server — versions 8.5, 9.0

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-9336?: CVE-2026-9336 is a medium-severity vulnerability in IBM Websphere Application Server, classified under Missing Authentication for Critical Function. CVSS score: 6.5/10. Published 2026-09-10.
How severe is CVE-2026-9336?: Medium severity. CVSS v3 base score is 6.5 out of 10.