CVE-2026-18998— cosmicstack-labs mercury-agent delegate_task Tool sub-agent.ts SubAgent.run improper authorization
Possible ATT&CK Techniques 2AI
T1068 · Exploitation for Privilege Escalation T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 13
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| cosmicstack-labs | mercury-agent | 1.1.0 | affected |
1.1.1 | affected | ||
1.1.2 | affected | ||
1.1.3 | affected | ||
1.1.4 | affected | ||
1.1.5 | affected | ||
1.1.6 | affected | ||
1.1.7 | affected | ||
| … +5 more rows | |||
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I. Basic Information for CVE-2026-18998
Vulnerability Information
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Vulnerability Title
cosmicstack-labs mercury-agent delegate_task Tool sub-agent.ts SubAgent.run improper authorization
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Cosmic Stack Mercury 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cosmic Stack Mercury是Cosmic Stack组织的一个具备权限控制、长期记忆、Token预算管理和多渠道交互能力的AI智能体框架。 Cosmic Stack Mercury 1.1.12及之前版本存在安全漏洞，该漏洞源于delegate_task Tool组件中src/core/sub-agent.ts文件的SubAgent.run函数存在授权不当，可能导致权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| cosmicstack-labs | mercury-agent | 1.1.0 | cpe:2.3:a:cosmicstack-labs:mercury-agent:*:*:*:*:*:*:*:* |
II. Public POCs for CVE-2026-18998
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-18998 (2)
Same Patch Batch · cosmicstack-labs · 2026-08-06 · 3 CVEs total
| CVE-2026-18996 | 6.3 MEDIUM | cosmicstack-labs mercury-agent run_command permissions.ts PermissionManager.checkShellComm |
| CVE-2026-18997 | 6.3 MEDIUM | cosmicstack-labs mercury-agent bg agent.ts Agent.handleBgCommand authorization |
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V. Comments for CVE-2026-18998
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