Description
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.
Published: 2026-09-14
Score: 4.8 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Local Information Disclosure
Action: Monitor
AI Analysis

Impact

The vulnerability resides in the CheckShellCommand method of Mercury Agent's Shell Permission Manifest. An attacker able to execute a crafted manipulation locally can cause the function to leak sensitive data that should not be exposed. The flaw stems from improper validation of input permissions, leading to an information disclosure weakness (CWE-200) and a lack of access control (CWE-284).

Affected Systems

Affected systems include cosmicstack‑labs Mercury Agent releases up to version 1.2.0. The critical code is located in mercury‑agent/src/capabilities/permissions.ts. Any installation of these versions that allows local shell execution is vulnerable.

Risk and Exploitability

The CVSS score of 4.8 indicates a moderate severity. The EPSS score is not available, and the vulnerability is not listed in CISA KEV. The exploitation vector is local execution; the public exploit has been published, allowing a local attacker to instantiate the issue. Because no patch has yet been released, the risk remains a potential medium threat for environments where the Mercury Agent runs with elevated privileges.

Generated by OpenCVE AI on September 15, 2026 at 12:09 UTC.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Update Mercury Agent to a version newer than 1.2.0 when it becomes available, or replace the Shell Permission Manifest checks with stricter permission validation logic.
  • Configure operating‑system permissions to restrict who can run the Mercury Agent executable and limit local shell access to only trusted users.
  • Disable or monitor the PermissionManager.checkShellCommand functionality by disabling the Shell Permission Manifest feature or by logging all permission checks and reviewing logs for anomalous activity.

Generated by OpenCVE AI on September 15, 2026 at 12:09 UTC.

Tracking

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Advisories

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History

Mon, 14 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Description 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.
Title cosmicstack-labs mercury-agent Shell Permission Manifest permissions.ts PermissionManager.checkShellCommand information disclosure
First Time appeared Cosmicstack-labs
Cosmicstack-labs mercury-agent
Weaknesses CWE-200
CWE-284
CPEs cpe:2.3:a:cosmicstack-labs:mercury-agent:*:*:*:*:*:*:*:*
Vendors & Products Cosmicstack-labs
Cosmicstack-labs mercury-agent
References
Metrics cvssV2_0

{'score': 1.7, 'vector': 'AV:L/AC:L/Au:S/C:P/I:N/A:N/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 3.3, 'vector': 'CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 3.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 4.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:P'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Subscriptions

Cosmicstack-labs Mercury-agent
cve-icon MITRE

Status: PUBLISHED

Assigner: VulDB

Published:

Updated: 2026-09-14T19:00:26.923Z

Reserved: 2026-09-13T16:29:45.144Z

Link: CVE-2026-90811

cve-icon Vulnrichment

Updated: 2026-09-14T19:00:22.689Z

cve-icon NVD

Status : Deferred

Published: 2026-09-14T19:18:11.670

Modified: 2026-09-14T20:56:48.220

Link: CVE-2026-90811

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-15T12:15:08Z

Weaknesses
  • CWE-200

    Exposure of Sensitive Information to an Unauthorized Actor

  • CWE-284

    Improper Access Control