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Description

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.

PUBLISHED Reserved 2026-03-27 | Published 2026-03-27 | Updated 2026-03-31 | Assigner VulDB




MEDIUM: 6.9CVSS: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
HIGH: 7.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
HIGH: 7.3CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R
7.5AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:ND/RC:UR

Problem types

Missing Authentication

Improper Authentication

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.353836 (VDB-353836 | OpenBMB XAgent ShareServer WebSocket Endpoint share.py check_user missing authentication) vdb-entry technical-description

vuldb.com/?ctiid.353836 (VDB-353836 | CTI Indicators (IOB, IOC, IOA)) signature permissions-required

vuldb.com/?submit.777622 (Submit #777622 | OpenBMB XAgent v1.0.0 CWE-306) third-party-advisory

gist.github.com/YLChen-007/531ec6b169f4b9ecbc8c2f0b2cd7c5ee exploit

cve.org (CVE-2026-4959)

nvd.nist.gov (CVE-2026-4959)

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