CVE-2026-56402 PUBLISHED

NanoClaw < 2.1.17 - Privilege Escalation via Unverified Approval Response Handler

Assigner: VulnCheck
Reserved: 21.06.2026 Published: 23.06.2026 Updated: 23.06.2026

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.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS Score: 7.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CVSS Score: 6.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	None

CVSS 3.1

Product Status

Vendor	nanocoai
Product	nanoclaw
Versions	Default: unaffected affected from 0 to 2.1.17 (excl.) Version 2.1.17 is unaffected

CVE-2026-56402 PUBLISHED

NanoClaw < 2.1.17 - Privilege Escalation via Unverified Approval Response Handler

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Problem Types