CVE-2026-4958
OpenBMB XAgent WebSocket Endpoint replayer.py ReplayServer.send_data authorization
- State
- Published
- Severity
- 2.3 Low
- Published
- Mar 27, 2026
- Updated
- Mar 30, 2026
- Reserved
- Mar 27, 2026
Description
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 manipulation of the argument interaction_id leads to authorization bypass. The attack may be launched remotely. Attacks of this nature are highly complex. The exploitability is reported as difficult. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.3 Low | CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 3.1 Low | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R | VulDB |
| 3.0 | 3.1 Low | CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R | VulDB |
| 2.0 | 2.1 Low | AV:N/AC:H/Au:S/C:P/I:N/A:N/E:POC/RL:ND/RC:UR | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
XAgentOpenBMB |
|
References
- VDB-353835 | OpenBMB XAgent WebSocket Endpoint replayer.py ReplayServer.send_data authorizationvdb-entrytechnical-description
- VDB-353835 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- Submit #777618 | OpenBMB XAgent v1.0.0 Authorization Bypass Through User-Controlled Key (CWE-639)third-party-advisory
- https://gist.github.com/YLChen-007/dc46c2a710ecb9e855695f32da8bcab5exploit
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