TI-2026-61716 Aliases CVE-2026-90813 GHSA-9hv7-6jr2-3g59

cosmicstack-labs mercury-agent Shell Command Execution permissions.ts checkShellCommand validate before canonicalize

MEDIUM 57CWE-179Published 2026-09-14 · Updated 2026-09-14

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: —
Confidentiality · integrity · availability: Low · None · None
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

A vulnerability was detected in cosmicstack-labs mercury-agent up to 1.1.13. Affected is the function checkShellCommand of the file src/capabilities/permissions.ts of the component Shell Command Execution. The manipulation results in incorrect behavior order: validate before canonicalize. The attack may be launched remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00554 46th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
cosmicstack-labs	mercury-agent	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; 1.1.13	—	No fix listed	CNA

mercury-agent Vendorcosmicstack-labs Affected 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; 1.1.13 Fixed in — No fix listed CNA

CPE names CNA · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:cosmicstack-labs:mercury-agent::::::::	—	—	—

cpe:2.3:a:cosmicstack-labs:mercury-agent:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2026-90813
2026-10-03 Alias added: GHSA-9hv7-6jr2-3g59

References

Exploit 1

https://github.com/cosmicstack-labs/mercury-agent/issues/95

Other 1

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

TI-2026-61717 cosmicstack-labs mercury-agent GitHub API github.ts githubRequest server-side request forgery CVSS 4.0MEDIUM 5.3
TI-2026-61715 cosmicstack-labs mercury-agent Shell Command Permission permissions.ts checkShellCommand privileges assignment CVSS 4.0MEDIUM 5.3
TI-2026-61713 Improper authorization in cosmicstack-labs mercury-agent CVSS 4.0MEDIUM 5.3
TI-2026-15525 cosmicstack-labs mercury-agent delegate_task Tool sub-agent.ts SubAgent.run improper authorization CVSS 4.0MEDIUM 5.3
TI-2026-15524 cosmicstack-labs mercury-agent bg agent.ts Agent.handleBgCommand authorization CVSS 4.0MEDIUM 5.3
TI-2026-15523 cosmicstack-labs mercury-agent run_command permissions.ts PermissionManager.checkShellCommand privileges assignment CVSS 4.0MEDIUM 5.3

See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences