CVE-2026-4958

LOW 3.1

OpenBMB XAgent WebSocket Endpoint replayer.py ReplayServer.send_data authorization

CVSS Score

3.1

EPSS Score

0.0%

EPSS Percentile

7th

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.

CWE	CWE-639 CWE-285
Vendor	openbmb
Product	xagent
Published	Mar 27, 2026
Last Updated	Mar 30, 2026

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CVSS v3 Breakdown

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

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

OpenBMB / XAgent

1.0.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/?id.353835 vuldb.com: https://vuldb.com/?ctiid.353835 vuldb.com: https://vuldb.com/?submit.777618 gist.github.com: https://gist.github.com/YLChen-007/dc46c2a710ecb9e855695f32da8bcab5

Credits

🔍 Eric-z (VulDB User) VulDB