TI-2026-61713 Aliases CVE-2026-90810 GHSA-xm72-m8gr-4jp8

Improper authorization in cosmicstack-labs mercury-agent

MEDIUM 57CWE-266Published 2026-09-14 · Updated 2026-09-15

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Privilege escalation, Security bypass
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-266 and CWE-285.

Summary

A security flaw has been discovered in cosmicstack-labs mercury-agent up to 1.1.13. The impacted element is the function PermissionManager.checkShellCommand of the file mercury-agent/src/capabilities/permissions.ts of the component Shell Command Permission Check. Performing a manipulation results in improper authorization. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. 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 0.00366 30th 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-2026-90810
2026-10-03 Alias added: GHSA-xm72-m8gr-4jp8

References

Exploit 1

https://github.com/cosmicstack-labs/mercury-agent/issues/101

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-2026-61716 cosmicstack-labs mercury-agent Shell Command Execution permissions.ts checkShellCommand validate before canonicalize 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-2026-15525 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