CVE-2026-102126

HIGH 8.1

Kiteworks Core Stored Cross-site Scripting (XSS)

CVSS Score

8.1

EPSS Score

0.0%

EPSS Percentile

0th

A stored cross-site scripting (XSS) weakness in Kiteworks Core could allow an administrator holding only a single, narrowly scoped delegated permission to store crafted content that later executes arbitrary JavaScript in the authenticated session of a System Administrator who views the affected page. This could have permitted the lower-privileged administrator to escalate to full administrative control of the tenant, including the creation of a new administrative account.

CWE	CWE-79
Vendor	kiteworks
Product	core
Published	Sep 30, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

Kiteworks / Core

0 < 9.5.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/kiteworks/security-advisories/security/advisories/GHSA-ccfx-6hq4-fx4g raw.githubusercontent.com: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json

Credits

Icare, https://yeswehack.com/hunters/icare Supr4s, https://yeswehack.com/hunters/Supr4s wlayzz, https://yeswehack.com/hunters/wlayzz truff, https://yeswehack.com/hunters/truff