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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.

PUBLISHED Reserved 2026-03-27 | Published 2026-03-27 | Updated 2026-03-30 | Assigner VulDB




LOW: 2.3CVSS: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
LOW: 3.1CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
LOW: 3.1CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R
2.1AV:N/AC:H/Au:S/C:P/I:N/A:N/E:POC/RL:ND/RC:UR

Problem types

Authorization Bypass

Improper Authorization

Product status

1.0.0
affected

Timeline

2026-03-27:Advisory disclosed
2026-03-27:VulDB entry created
2026-03-27:VulDB entry last update

Credits

Eric-z (VulDB User) reporter

VulDB coordinator

References

vuldb.com/?id.353835 (VDB-353835 | OpenBMB XAgent WebSocket Endpoint replayer.py ReplayServer.send_data authorization) vdb-entry technical-description

vuldb.com/?ctiid.353835 (VDB-353835 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.777618 (Submit #777618 | OpenBMB XAgent v1.0.0 Authorization Bypass Through User-Controlled Key (CWE-639)) third-party-advisory

gist.github.com/YLChen-007/dc46c2a710ecb9e855695f32da8bcab5 exploit

cve.org (CVE-2026-4958)

nvd.nist.gov (CVE-2026-4958)

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