CVE-2026-4959

HIGH 7.3

OpenBMB XAgent ShareServer WebSocket Endpoint share.py check_user missing authentication

CVSS Score

7.3

EPSS Score

0.1%

EPSS Percentile

19th

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.

CWE	CWE-306 CWE-287
Vendor	openbmb
Product	xagent
Published	Mar 27, 2026
Last Updated	Mar 31, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/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.353836 vuldb.com: https://vuldb.com/?ctiid.353836 vuldb.com: https://vuldb.com/?submit.777622 gist.github.com: https://gist.github.com/YLChen-007/531ec6b169f4b9ecbc8c2f0b2cd7c5ee

Credits

🔍 Eric-z (VulDB User) VulDB