CVE-2026-4959 MEDIUM

CVE-2026-4959: OpenBMB XAgent ShareServer WebSocket Endpoint share.py check_user missing authentication

Vendor Openbmb
Product XAgent
Weakness CWE-306 · Missing auth
Published March 27, 2026
Last update March 31, 2026

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 27, 2026 CVE published
March 31, 2026 Record updated