cosmicstack-labs mercury-agent up to 1.1.12 delegate_task Tool src/core/sub-agent.ts SubAgent.run improper authorization

Summaryinfo

A vulnerability identified as critical has been detected in cosmicstack-labs mercury-agent up to 1.1.12. The affected element is the function SubAgent.run of the file src/core/sub-agent.ts of the component delegate_task Tool. The manipulation leads to improper authorization. This vulnerability is documented as CVE-2026-18998. The attack can be initiated remotely. Additionally, an exploit exists. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability, which was classified as critical, has been found in cosmicstack-labs mercury-agent up to 1.1.12. This issue affects the function SubAgent.run of the file src/core/sub-agent.ts of the component delegate_task Tool. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality, integrity, and availability.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-18998. The exploitation is known to be easy. The attack may be initiated remotely. Technical details as well as a public exploit are known. MITRE ATT&CK project uses the attack technique T1548.002 for this issue.

The exploit is available at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• cosmicstack-labs

Name

• mercury-agent

Version

• 1.1.0
• 1.1.1
• 1.1.2
• 1.1.3
• 1.1.4
• 1.1.5
• 1.1.6
• 1.1.7
• 1.1.8
• 1.1.9
• 1.1.10
• 1.1.11
• 1.1.12

Website

• Product: https://github.com/cosmicstack-labs/mercury-agent/

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Submitinfo

Accepted

• Submit #862628: cosmicstack-labs mercury-agent 1.1.12 Improper Authorization (CWE-285) (by ChenMarry)

Duplicate

• Submit #XXXXXX: Xxxxxxxxxxx-xxxx Xxxxxxx-xxxxx X.x.xx Xxxxxxxx Xxxxxxxxxxxxx (xxx-xxx) (by ChenMarry)

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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