---
title: "CVE-2026-102126: Kiteworks Core - Stored XSS"
description: "Kiteworks Core contains a stored XSS caused by insufficient input sanitization allowing a delegated administrator to store crafted content that executes arbitrary JavaScript in a System Administrator's session, exploit requires delegated admin privileges."
url: https://panop.io/threat-heartbeat/CVE-2026-102126/
---

# CVE-2026-102126 Kiteworks Core - Stored XSS

Kiteworks Core contains a stored XSS caused by insufficient input sanitization allowing a delegated administrator to store crafted content that executes arbitrary JavaScript in a System Administrator's session, exploit requires delegated admin privileges.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.33% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-102126)

## Details

Type

Stored XSS

Impact

Privilege Escalation, Client Script Exec

CVSS vector

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

Published

30 September 2026

Updated

15 October 2026

Weakness

[CWE-79](https://cwe.mitre.org/data/definitions/79.html)

## Vendor fix

Update to the latest version containing the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-102126](https://nvd.nist.gov/vuln/detail/CVE-2026-102126)
- [https://github.com/kiteworks/security-advisories/security/advisories/GHSA-ccfx-6hq4-fx4g](https://github.com/kiteworks/security-advisories/security/advisories/GHSA-ccfx-6hq4-fx4g)
- [https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf\_files/VA/white/2026/va-26-274-01.json](https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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