How broadly exploitable is this vulnerability?

The vulnerability is remotely exploitable by anyone who can reach the ShareServer WebSocket endpoint, because it does not require prior authentication when the vulnerable path is exposed. The practicality of exploitation depends on how easily valid or guessable `interaction_id` values can be obtained.

Does an attacker need valid user credentials to exploit this?

No. The issue stems from missing or improper authentication tied to the `interaction_id` parameter; a remote attacker can attempt to exploit the endpoint without possessing any legitimate user credentials, as long as they can send crafted WebSocket traffic.

What is the safest general fix pattern for this class of bug?

The safest pattern is to enforce mandatory, centralized authentication for all WebSocket connections and ensure that resource or interaction identifiers are always validated against the authenticated user or a dedicated, securely generated share token. Identifiers should never be treated as standalone proof of identity or authorization.

Severity:

HIGH RISK

(7.3)

Missing Authentication (CWE-287) in OpenBMB XAgent ShareServer WebSocket Endpoint

CVE-2026-4959

Published:

Mar 27, 2026

Status:

Awaiting Analysis

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Missing Authentication

CWE:

CWE-287;CWE-306

Impact:

Authentication Bypass and Unauthorized Access

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

Vulnerability Type

Category:

Missing Authentication

CWE:

CWE-287;CWE-306

Impact:

Authentication Bypass and Unauthorized Access

Severity:

HIGH RISK

(7.3)

CVSS Version:

3.1

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Ask AI for summary of CodeAnt

Missing Authentication (CWE-287) in OpenBMB XAgent ShareServer WebSocket Endpoint

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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