CVE-2026-90810: Cosmicstack-Labs Mercury-Agent

Medium severity, CVSS 6.3. EPSS: 0.4% chance of exploitation in the next 30 days.

A security flaw has been discovered in cosmicstack-labs mercury-agent up to 1.1.13. The impacted element is the function PermissionManager.checkShellCommand of the file mercury-agent/src/capabilities/permissions.ts of the component Shell Command Permission Check. Performing a manipulation results in improper authorization. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

Affected products

• Cosmicstack-Labs Mercury-Agent: version 1.1.0 only; version 1.1.1 only; version 1.1.2 only; version 1.1.3 only; version 1.1.4 only; version 1.1.5 only; …

Published 2026-09-14. Last modified 2026-09-15.