CVE-2026-18998

cosmicstack-labs mercury-agent delegate_task Tool sub-agent.ts SubAgent.run improper authorization

State: Published
Severity: 5.3 Medium
Published: Aug 6, 2026
Updated: Aug 6, 2026
Reserved: Aug 5, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P	VulDB
3.1	6.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R	VulDB
3.0	6.3 Medium	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R	VulDB
2.0	6.5 Medium	AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR	VulDB

Weaknesses

CWE-285 Improper Authorization
CWE-266 Incorrect Privilege Assignment

Affected Products

Product	Versions
mercury-agentcosmicstack-labs	1.1.0Affected 1.1.1Affected 1.1.2Affected 1.1.3Affected 1.1.4Affected 1.1.5Affected 1.1.6Affected 1.1.7Affected 1.1.8Affected 1.1.9Affected 1.1.10Affected 1.1.11Affected 1.1.12Affected

References

VDB-386381 | cosmicstack-labs mercury-agent delegate_task Tool sub-agent.ts SubAgent.run improper authorizationvdb-entrytechnical-description
VDB-386381 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
CVE-2026-18998 | CVE Analysis and Reportthird-party-advisory
Submit #862628 | cosmicstack-labs mercury-agent 1.1.12 Improper Authorization (CWE-285)third-party-advisory
Submit #862629 | cosmicstack-labs mercury-agent 1.1.12 Improper Authorization (CWE-285) (Duplicate)third-party-advisory
https://github.com/cosmicstack-labs/mercury-agent/issues/74exploitissue-tracking
https://github.com/cosmicstack-labs/mercury-agent/product

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.