CVE-2026-4959CWE-287CWE-306

OpenBMB XAgent ShareServer WebSocket Endpoint share.py check_user missing authentication

Medium · published March 27, 2026

CVSS v4.0
6.9
EPSS
1%
Percentile
54.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
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
EPSS
0.00763 · 54.9th percentile
Weaknesses
CWE-287 · Improper Authentication; CWE-306 · Missing Authentication for Critical Function
Published
2026-03-27T15:31Z
EPSS history
Timeline
  • 27 MAR 15:31Z
    OpenBMB XAgent ShareServer WebSocket Endpoint share.py check_user missing authentication
    cvelistv5