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TI-2026-40760 Aliases CVE-2026-56402GHSA-mhq9-hcw8-22mj

NanoClaw < 2.1.17 - Privilege Escalation via Unverified Approval Response Handler

Priority MEDIUM 64CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

NanoClaw before 2.1.17 contains a privilege escalation vulnerability in the handleApprovalsResponse function that fails to verify responder role authorization. Attackers with a valid questionId can approve or reject privileged actions like package installation by submitting approval response payloads without proper role validation.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00376 31st percentileScored 2026-11-07
Fix Fixed nanoclaw (nanocoai): 2.1.17

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
nanocoainanoclawbefore 2.1.172.1.17Patch availableCNA
  • nanoclaw Vendornanocoai Affected before 2.1.17 Fixed in 2.1.17 Patch available CNA

Remediation

  • Fix · CNA nanoclaw (nanocoai) Fixed in 2.1.17

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    nanocoai nanoclaw 2.1.17

    3 records Highest priority Priority MEDIUM 1 MEDIUM, 2 LOW

    Other records, highest priority first

    • TI-2026-40873 NanoClaw < 2.1.17 - Privilege Escalation via Unauthorized create_agent System ActionPriority LOW 29
    • TI-2026-40872 NanoClaw < 2.1.17 - Arbitrary File Read via Symlink Following in forwardAttachedFilesPriority LOW 29
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-56402
  2. 2026-10-03 Alias added: GHSA-mhq9-hcw8-22mj

References

Patch 2

  • TI-2026-15518 nanocoai NanoClaw send_file core.ts path traversal CVSS 4.0MEDIUM 6.9
  • TI-2026-61710 nanocoai NanoClaw Attachment agent-route.ts forwardAttachedFiles link following CVSS 4.0MEDIUM 5.3
  • TI-2026-15531 nanocoai NanoClaw Child-Agent Creation create-agent.ts handleCreateAgent privileges management CVSS 4.0MEDIUM 5.3
  • TI-2026-14327 nanocoai NanoClaw add_mcp_server request.ts handleAddMcpServer improper authorization CVSS 4.0MEDIUM 5.3
  • TI-2026-14326 nanocoai NanoClaw MCP Server Approval chat-sdk-bridge.ts createChatSdkBridge.setup improper authorization CVSS 4.0MEDIUM 4.8
  • TI-2026-40873 NanoClaw < 2.1.17 - Privilege Escalation via Unauthorized create_agent System Action CVSS 4.0MEDIUM 6.8
See all 8 →

Sources

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