What is CVE-2026-15887?

CVE-2026-15887 is a medium-severity vulnerability in IBM Websphere Application Server, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.4/10. Published 2026-09-14.

How severe is CVE-2026-15887?

Medium severity. CVSS v3 base score is 5.4 out of 10.

SSRF in IBM Websphere Application Server

CVE-2026-15887

IBM WebSphere Application Server 9.0, and 8.5 is affected by blind server-side request forgery when processing SOAP requests.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-09-14 · last modified 2026-09-16.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (16.4th percentile), scored 2026-10-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 16.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

IBM Websphere Application Server — versions 8.5, 9.0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

www.ibm.com/support/pages/node/7286610 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-15887?: CVE-2026-15887 is a medium-severity vulnerability in IBM Websphere Application Server, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.4/10. Published 2026-09-14.
How severe is CVE-2026-15887?: Medium severity. CVSS v3 base score is 5.4 out of 10.