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TI-2026-15523 Aliases CVE-2026-18996GHSA-ccg4-hv3q-9622

cosmicstack-labs mercury-agent run_command permissions.ts PermissionManager.checkShellCommand privileges assignment

Priority MEDIUM 57CWE-266Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Privilege escalation
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.

Summary

A vulnerability has been found in cosmicstack-labs mercury-agent up to 1.1.12. This vulnerability affects the function PermissionManager.checkShellCommand of the file src/capabilities/permissions.ts of the component run_command Handler. Such manipulation leads to incorrect privilege assignment. The attack may be performed from remote. The exploit has been disclosed to the 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 0.00427 37th 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

VendorProductAffected versionsFixed inStatusSource
cosmicstack-labsmercury-agent1.1.0; 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—No fix listedCNA
  • 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 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
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

  1. 2026-10-02 Threatist record created from CVE-2026-18996
  2. 2026-10-03 Alias added: GHSA-ccg4-hv3q-9622

References

Exploit 1

Other 1

  • 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-2026-61713 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
See all 7 →

Sources

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