CriticalVulnerabilityLLM-specific

CVE-2026-22252: LibreChat MCP stdio transport accepts arbitrary commands without validation

Source: NVD(opens in a new tab)
Identifier: CVE-2026-22252
Published: January 12, 2026
Record updated: October 9, 2026

Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 4.2%

Summary

CVE-2026-22252 affects LibreChat before v0.8.2-rc2. Its MCP stdio transport accepts arbitrary commands without validation, so any authenticated user can run shell commands as root inside the container with a single API request. The weakness is classified as CWE-285, Improper Authorization.

Mitigation

Fixed in v0.8.2-rc2.

Details

Scores and exploitation

CVSS score: 9.1(critical)
EPSS: 4.2%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on November 4, 2026.

Weaknesses and techniques

Weakness (CWE): CWE-285

Classification

Attack type: Other
Attack sophistication: Trivial
AI component targeted: Plugin
Impact: Confidentiality,
Integrity,
Availability
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-22252

First tracked: February 15, 2026 at 08:50 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 90% (self-assessed)

Topics

Model Context Protocol

Summary

Mitigation

Topics

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