---
id: CVE-2026-90811
title: A weakness has been identified in cosmicstack-labs mercury-agent up to 1.2.0
summary: >-
  A weakness has been identified in cosmicstack-labs mercury-agent up to 1.2.0.
  This affects the function PermissionManager.checkShellCommand of the file
  mercury-agent/src/capabilities/permissions.ts of the component Shell
  Permission Manif…
severity: low
cvss: 3.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-200
  - CWE-284
vendor: cosmicstack-labs
product: mercury-agent
affected:
  - mercury-agent 1.0
  - mercury-agent 1.1
  - mercury-agent 1.2.0
published: '2026-09-14'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T20:56:48.220'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90811'
references:
  - url: 'https://github.com/cosmicstack-labs/mercury-agent/'
    label: cna@vuldb.com
  - url: 'https://github.com/cosmicstack-labs/mercury-agent/issues/102'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/cve/CVE-2026-90811'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/submit/922877'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403313'
    label: cna@vuldb.com
  - url: 'https://vuldb.com/vuln/403313/cti'
    label: cna@vuldb.com
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T19:00:15.175855Z'
ingestedAt: '2026-09-14T19:13:23.469Z'
epss: 0.00149
epssPercentile: 0.03368
---

## Overview

A weakness has been identified in cosmicstack-labs mercury-agent up to 1.2.0. This affects the function PermissionManager.checkShellCommand of the file mercury-agent/src/capabilities/permissions.ts of the component Shell Permission Manifest. Executing a manipulation can lead to information disclosure. The attack is restricted to local execution. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.