What is CVE-2026-8644?

CVE-2026-8644 is a critical-severity vulnerability in Ibm Websphere Application Server, classified under Authentication Bypass by Spoofing. CVSS score: 9.1/10. Published 2026-06-01.

How severe is CVE-2026-8644?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Ibm Websphere Application Server

CVE-2026-8644

IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to identity spoofing.

EPSS: 0.000 (11.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Ibm Websphere Application Server — versions 9.0, 8.5
Ibm Websphere_application_server

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

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

Frequently asked questions

What is CVE-2026-8644?: CVE-2026-8644 is a critical-severity vulnerability in Ibm Websphere Application Server, classified under Authentication Bypass by Spoofing. CVSS score: 9.1/10. Published 2026-06-01.
How severe is CVE-2026-8644?: Critical severity. CVSS v3 base score is 9.1 out of 10.