# CVE-2026-4959: A vulnerability was found in OpenBMB XAgent 1.0.0. This impacts the function check_user of the file…

Source: https://junglewise.ai/threats/cve-2026-4959-a-vulnerability-was-found-in-openbmb-xagent-1-0-0-this-impacts-the  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-03-27  
License: CC BY 4.0 with a link back

CVE-2026-4959 · Severity: high · CVSS 7.3 · Published 2026-03-27

A vulnerability was found in OpenBMB XAgent 1.0.0. This impacts the function check_user of the file XAgentServer/application/websockets/share.py of the component ShareServer WebSocket Endpoint. Performing a manipulation of the argument interaction_id results in missing authentication. Remote exploitation of the attack is possible. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Technologies: [OpenBMB XAgent](https://junglewise.ai/threats/technologies/xagent). Vendors: [OpenBMB](https://junglewise.ai/threats/vendors/openbmb).

## Quick answers

**Is CVE-2026-4959 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-4959 being exploited in the wild.

**How severe is CVE-2026-4959?** High severity, with a CVSS score of 7.3, published 27 March 2026.

**Which products and versions are affected?** OpenBMB XAgent. The advisory does not name versions.

**Is there a fix for CVE-2026-4959?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**Am I affected by CVE-2026-4959?** Check whether you run OpenBMB XAgent. 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.

## Affected products

- OpenBMB XAgent

## Related threats

- [OpenBMB XAgent directory traversal in file upload](https://junglewise.ai/threats/cve-2026-51912-openbmb-xagent-v1-0-0-contains-directory-traversal-vulnerability)
- [OpenBMB XAgent path traversal in workspace file endpoint](https://junglewise.ai/threats/cve-2026-72713-openbmb-xagent-path-traversal-in-workspace-file-endpoint)
- [OpenBMB XAgent path traversal in workspace router](https://junglewise.ai/threats/cve-2026-26396-openbmb-xagent-path-traversal-in-workspace-router)
- [A vulnerability has been found in OpenBMB XAgent 1.0.0. This affects the function…](https://junglewise.ai/threats/cve-2026-4958-a-vulnerability-has-been-found-in-openbmb-xagent-1-0-0-this)
- [A flaw has been found in OpenBMB XAgent 1.0.0. The impacted element is the function FunctionHandler.handle_tool_call…](https://junglewise.ai/threats/cve-2026-4957-a-flaw-has-been-found-in-openbmb-xagent-1-0-0-the-impacted-element)