CVE-2026-18998: Improper Authorization in cosmicstack-labs mercury-agent
CVE-2026-18998 is a medium severity vulnerability in cosmicstack-labs mercury-agent up to version 1.1.12. It affects the SubAgent.run function in the src/core/sub-agent.ts file of the delegate_task tool component. The flaw allows improper authorization through remote manipulation. The vulnerability has been publicly disclosed, but no official patch or vendor response is currently available.
AI Analysis
Technical Summary
This vulnerability in cosmicstack-labs mercury-agent (versions 1.1.0 through 1.1.12) involves improper authorization in the SubAgent.run function of the delegate_task tool component. An attacker can remotely exploit this flaw to bypass authorization controls. The issue was reported early to the project, but no remediation or patch has been provided yet. The CVSS 4.0 base score is 5.3, indicating medium severity with network attack vector, low attack complexity, no privileges required, and limited confidentiality, integrity, and availability impacts.
Potential Impact
Successful exploitation allows remote attackers to bypass authorization checks in the affected function, potentially enabling unauthorized actions within the mercury-agent component. The impact is limited to the scope of the delegate_task tool's SubAgent.run function and is rated as medium severity.
Mitigation Recommendations
No official fix or patch is currently available, and the vendor has not responded to the issue report. Users should monitor the vendor's communications for updates and consider implementing compensating controls to restrict access to the mercury-agent service until a patch is released. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
CVE-2026-18998: Improper Authorization in cosmicstack-labs mercury-agent
Description
CVE-2026-18998 is a medium severity vulnerability in cosmicstack-labs mercury-agent up to version 1.1.12. It affects the SubAgent.run function in the src/core/sub-agent.ts file of the delegate_task tool component. The flaw allows improper authorization through remote manipulation. The vulnerability has been publicly disclosed, but no official patch or vendor response is currently available.
CVSS v4.0
Score 5.3medium
Affected software
pkg:github/cosmicstack-labs/mercury-agentcpe:2.3:a:cosmicstack-labs:mercury-agent:*:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in cosmicstack-labs mercury-agent (versions 1.1.0 through 1.1.12) involves improper authorization in the SubAgent.run function of the delegate_task tool component. An attacker can remotely exploit this flaw to bypass authorization controls. The issue was reported early to the project, but no remediation or patch has been provided yet. The CVSS 4.0 base score is 5.3, indicating medium severity with network attack vector, low attack complexity, no privileges required, and limited confidentiality, integrity, and availability impacts.
Potential Impact
Successful exploitation allows remote attackers to bypass authorization checks in the affected function, potentially enabling unauthorized actions within the mercury-agent component. The impact is limited to the scope of the delegate_task tool's SubAgent.run function and is rated as medium severity.
Mitigation Recommendations
No official fix or patch is currently available, and the vendor has not responded to the issue report. Users should monitor the vendor's communications for updates and consider implementing compensating controls to restrict access to the mercury-agent service until a patch is released. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-08-05T19:41:53.908Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a741e9bbf8831d53936e7d4
Added to database: 08/06/2026, 05:41:47 UTC
Last enriched: 08/06/2026, 06:31:03 UTC
Last updated: 08/06/2026, 06:31:03 UTC
Views: 7
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