Is this vulnerability remotely exploitable over the internet?

Yes, if LibreChat's agent actions or MCP features are exposed to remote users who can control URLs, an attacker can exploit the SSRF remotely, subject to authentication and feature configuration.

Does an attacker need authenticated access to exploit this issue?

In most realistic deployments, some level of interaction with LibreChat (often authenticated) is required to invoke agent actions or MCP with a crafted URL. The exact requirement depends on how these features are exposed and whether anonymous users can trigger them.

What is the safest general fix pattern for this type of SSRF issue?

The most robust pattern is to restrict outbound requests to a tightly controlled allowlist of destinations or service identifiers, combined with IP-range checks that block private, loopback, and metadata addresses even if they appear via DNS resolution.

Severity:

HIGH RISK

(7.7)

Server-Side Request Forgery (CWE-918) in LibreChat Agent Actions and MCP

CVE-2026-31945

Published:

Mar 27, 2026

Status:

Analyzed

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:

Server-Side Request Forgery (SSRF)

CWE:

CWE-918

Impact:

Unauthorized Access to Internal Network Resources

Severity:

HIGH RISK

(7.7)

CVSS Version:

3.1

Vulnerability Type

Category:

Server-Side Request Forgery (SSRF)

CWE:

CWE-918

Impact:

Unauthorized Access to Internal Network Resources

Severity:

HIGH RISK

(7.7)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

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Ask AI for summary of CodeAnt

Server-Side Request Forgery (CWE-918) in LibreChat Agent Actions and MCP

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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