CVE-2026-4959

OpenBMB XAgent ShareServer WebSocket Endpoint share.py check_user missing authentication

HIGH
7.5
CVSS Score
Published: March 27, 2026 at 03:31 PM UTC
Updated: October 26, 2026 at 09:10 PM UTC
1 product affected across 1 vendorXAgent

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Severity
HIGH7.5
Exploit prediction
EPSS 0.4%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

VDB EntryTechnical DescriptionPermissions Required
Source: cverecord
https://vuldb.com/?id.353836
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/?ctiid.353836
Third Party AdvisoryIssue Tracking
Source: cverecord
https://vuldb.com/?submit.777622

SSVC — Action Prioritization

SSVCPoCAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-306CWE-287

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