Auth bypass in Openbmb Xagent
CVE-2026-4958
A vulnerability has been found in OpenBMB XAgent 1.0.0. This affects the function ReplayServer.on_connect/ReplayServer.send_data of the file XAgentServer/application/websockets/replayer.py of the component WebSocket Endpoint. Such manipula…
EPSS: 0.001 (15.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Openbmb Xagent — versions 1.0.0
Weakness classification (CWE)
References
- VDB-353835 | OpenBMB XAgent WebSocket Endpoint replayer.py ReplayServer.send_data authorization (Permissions Required, technical-description, VDB Entry, vdb-entry)
- VDB-353835 | CTI Indicators (IOB, IOC, IOA) (signature, Permissions Required, permissions-required, VDB Entry)
- Submit #777618 | OpenBMB XAgent v1.0.0 Authorization Bypass Through User-Controlled Key (CWE-639) (Third Party Advisory, Issue Tracking, third-party-advisory)
- cna@vuldb.com (Exploit, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2026-4958?
- CVE-2026-4958 is a low-severity vulnerability in Openbmb Xagent, classified under Improper Authorization. CVSS score: 3.1/10. Published 2026-03-27.
- How severe is CVE-2026-4958?
- Low severity. CVSS v3 base score is 3.1 out of 10.