Read the docs
TI-2026-61714 Aliases CVE-2026-90811GHSA-x845-4vjw-3f37

Information disclosure in cosmicstack-labs mercury-agent

Priority MEDIUM 55CWE-200Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure, Security bypass
Confidentiality · integrity · availability
Low · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-200 and CWE-284.

Summary

A weakness has been identified in cosmicstack-labs mercury-agent up to 1.2.0. This affects the function PermissionManager.checkShellCommand of the file mercury-agent/src/capabilities/permissions.ts of the component Shell Permission Manifest. Executing a manipulation can lead to information disclosure. The attack is restricted to local execution. The exploit has been made available to the public and could 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 0.00149 4th 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-agent1.0; 1.1; 1.2.0—No fix listedCNA
  • mercury-agent Vendorcosmicstack-labs Affected 1.0; 1.1; 1.2.0 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-2026-90811
  2. 2026-10-03 Alias added: GHSA-x845-4vjw-3f37

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