What is CVE-2026-102090?

CVE-2026-102090 is a medium-severity vulnerability in Kiteworks Core, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.3/10. Published 2026-09-30.

How severe is CVE-2026-102090?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Open Redirect in Kiteworks Core

CVE-2026-102090

Kiteworks Core before version 9.5.1 is vulnerable to Content Injection. A URL parameter in the PDF viewer was insufficiently validated, allowing an attacker-controlled document to be loaded and displayed under the trust of the legitimate application domain. This could increase the credibility of phishing attempts relying on malicious links embedded in the displayed content.

Vulnerability class: Open Redirect

Published 2026-09-30 · last modified 2026-10-01.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

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

Kiteworks Core

Weakness classification (CWE)

CWE-601 — URL Redirection to Untrusted Site (Open Redirect)

References

9119a7d8-5eab-497f-8521-727c672e3725 (vendor-advisory)
9119a7d8-5eab-497f-8521-727c672e3725 (third-party-advisory)

Frequently asked questions

What is CVE-2026-102090?: CVE-2026-102090 is a medium-severity vulnerability in Kiteworks Core, classified under URL Redirection to Untrusted Site (Open Redirect). CVSS score: 4.3/10. Published 2026-09-30.
How severe is CVE-2026-102090?: Medium severity. CVSS v3 base score is 4.3 out of 10.