CVE-2026-4192Public exploitNetwork attack vector

Authenticated command execution via shell interpolation

Published Mar 15, 2026 · Updated Mar 15, 2026

Command injection in setupToolHandlers in AvinashBole Quip MCP Server 1.0.0 allows remote authenticated users to execute arbitrary commands. setupToolHandlers routes threadId and content into readDocument and editDocument, which interpolate them into strings passed to child_process.exec without neutralizing shell metacharacters. Reaching the flaw requires access to invoke an MCP tool; successful exploitation runs commands with the server process's privileges and can read, alter, or disrupt host data.

CVSS severity6.3
Medium
EPSS probability1.43%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in setupToolHandlers in AvinashBole Quip MCP Server 1.0.0 allows remote authenticated users to execute arbitrary commands. setupToolHandlers routes threadId and content into readDocument and editDocument, which interpolate them into strings passed to child_process.exec without neutralizing shell metacharacters. Reaching the flaw requires access to invoke an MCP tool; successful exploitation runs commands with the server process's privileges and can read, alter, or disrupt host data.

The record

CVE
CVE-2026-4192
Published
Mar 15, 2026
Updated
Mar 15, 2026
Vendor
AvinashBole
Product
Quip MCP Server
Classifications
CWE-77, CWE-74, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

AvinashBole · Quip MCP Serverversion=1.0.0

Published CVSS scores

6.3VulDBCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
6.5VulDBAV:N/AC:L/Au:S/C:P/I:P/A:P
2.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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