CVE-2026-5833Public exploit

Local command execution via shell-interpolated tool arguments

Published Apr 9, 2026 · Updated Apr 9, 2026

Command injection in Brock Wilcox TaskWarrior MCP Server 1.0.0 through 1.0.1 allows local users to execute arbitrary shell commands. The mark_task_done, add_task, and get_next_tasks handlers interpolate identifier, description, project, tags, and due values into strings passed to child_process.execSync. A low-privileged local user who can supply MCP tool arguments gains command execution with the MCP server process's privileges.

CVSS severity5.3
Medium
EPSS probability0.71%
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 Brock Wilcox TaskWarrior MCP Server 1.0.0 through 1.0.1 allows local users to execute arbitrary shell commands. The mark_task_done, add_task, and get_next_tasks handlers interpolate identifier, description, project, tags, and due values into strings passed to child_process.execSync. A low-privileged local user who can supply MCP tool arguments gains command execution with the MCP server process's privileges.

The record

CVE
CVE-2026-5833
Published
Apr 9, 2026
Updated
Apr 9, 2026
Vendor
Brock Wilcox
Product
TaskWarrior MCP Server
Classifications
CWE-77, CWE-74, T1059.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 9, 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
  2. Affected versionversion=1.0.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Brock Wilcox · TaskWarrior MCP Serverversion=1.0.0; version=1.0.1

Published CVSS scores

5.3VulDBCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
1.9VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
4.3VulDBAV:L/AC:L/Au:S/C:P/I:P/A: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
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')
T1059.004Command and Scripting Interpreter: Unix Shell

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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