What is CVE-2026-93907?

CVE-2026-93907 is a high-severity vulnerability in IBM Websphere Application Server, classified under Improper Authentication. CVSS score: 8.1/10. Published 2026-10-13.

How severe is CVE-2026-93907?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in IBM Websphere Application Server

CVE-2026-93907

IBM WebSphere Application Server 8.5, and 9.0 could allow a remote attacker to bypass authentication by exploiting a flaw in the CSIv2 inbound propagation handler.

Vulnerability class: Broken Authentication

Published 2026-10-13 · last modified 2026-10-13.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

IBM Websphere Application Server — versions 8.5, 9.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.ibm.com/support/pages/node/7292216 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-93907?: CVE-2026-93907 is a high-severity vulnerability in IBM Websphere Application Server, classified under Improper Authentication. CVSS score: 8.1/10. Published 2026-10-13.
How severe is CVE-2026-93907?: High severity. CVSS v3 base score is 8.1 out of 10.