Is CVE-2026-18998 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-18998?

CVE-2026-18998 has a CVSS v3 severity of MEDIUM (6.3).

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CVE-2026-18998

Description

A vulnerability was determined in cosmicstack-labs mercury-agent up to 1.1.12. Impacted is the function SubAgent.run of the file src/core/sub-agent.ts of the component delegate_task Tool. Executing a manipulation can lead to improper authorization. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.