What is CVE-2026-35565?

CVE-2026-35565 is a medium-severity vulnerability in Apache Storm, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-13.

How severe is CVE-2026-35565?

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

XSS in Apache Storm

CVE-2026-35565

Stored Cross-Site Scripting (XSS) via Unsanitized Topology Metadata in Apache Storm UI Versions Affected: before 2.8.6 Description: The Storm UI visualization component interpolates topology metadata including component IDs, stream nam…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.005 (37.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Apache Storm
Apache Software Foundation Storm Ui — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security@apache.org (vendor-advisory, Release Notes, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2026-35565?: CVE-2026-35565 is a medium-severity vulnerability in Apache Storm, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-04-13.
How severe is CVE-2026-35565?: Medium severity. CVSS v3 base score is 5.4 out of 10.