# CVE-2026-102137: Kiteworks Core unrestricted upload of dangerous file type

Source: https://junglewise.ai/threats/cve-2026-102137-an-authenticated-administrator-could-bypass-the-content  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-30. Updated: 2026-09-30  
License: CC BY 4.0 with a link back

CVE-2026-102137 · Severity: medium · CVSS 4.1 · Published 2026-09-30

Kiteworks Core, a secure file transfer and collaboration appliance, contains a file upload validation bypass that allows authenticated administrators to store dangerous files on the system. While the vulnerability itself does not enable direct code execution, it could serve as a staging point for secondary attacks if an attacker can exploit another weakness to execute the stored files, potentially compromising sensitive data or system availability.

Technologies: [Kiteworks Core](https://junglewise.ai/threats/technologies/kiteworks-core). Vendors: [Kiteworks](https://junglewise.ai/threats/vendors/kiteworks).

## Quick answers

**Is CVE-2026-102137 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-102137 being exploited in the wild.

**How severe is CVE-2026-102137?** Medium severity, with a CVSS score of 4.1, published 30 September 2026.

**Which products and versions are affected?** Kiteworks Core before 9.5.1.

**Is there a fix for CVE-2026-102137?** A patch was published on 2026-09-30: version 9.5.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-102137 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-102137?** Check whether you run Kiteworks Core at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An authenticated administrator with elevated privileges can bypass content validation checks on administrative file uploads, allowing dangerous file types to be stored on the appliance (CWE-434). The vulnerability requires high privileges and network access but does not directly enable code execution—a secondary vulnerability is needed to execute the uploaded files. Remediation is available in version 9.5.1 and later.

## Affected products

- Kiteworks Core before 9.5.1

## Timeline

- 2026-09-30: disclosed
- 2026-09-30: patched: version 9.5.1

## References

- [https://github.com/kiteworks/security-advisories/security/advisories/GHSA-m6cv-4pjv-7435](https://github.com/kiteworks/security-advisories/security/advisories/GHSA-m6cv-4pjv-7435)
- [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)

## Related threats

- [Kiteworks Core stored cross-site scripting in administrative interface](https://junglewise.ai/threats/cve-2026-102147-a-stored-cross-site-scripting-xss-weakness-in-kiteworks-core)
- [Kiteworks Core SSRF via CRLF injection](https://junglewise.ai/threats/cve-2026-102145-an-authenticated-administrator-could-cause-the-server-to-issue)
- [Kiteworks Core remote code execution in notification template](https://junglewise.ai/threats/cve-2026-102142-a-system-notification-template-on-the-kiteworks-appliance-was)
- [Kiteworks Core privilege escalation in cluster-management operations](https://junglewise.ai/threats/cve-2026-102141-two-kiteworks-core-cluster-management-operations-did-not)
- [Kiteworks Core insufficient verification of data authenticity in import](https://junglewise.ai/threats/cve-2026-102140-an-authenticated-administrator-could-initiate-an-administrative)