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Vulnerability record · CVE-2026-56402 · published 23 June 2026

CVE-2026-56402: Missing authorization vulnerability

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.

7.1 CVSS 4.0 High EPSS 0.38% · top 71.1% CWE-862 · Missing authorization Deferred
7.1CVSS 4.0 base score
0.38%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
17 Sep 2026Last modified by NVD

Description

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:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/nanocoai/nanoclaw/commit/6227bd1a5b016fb1eb76411bb6681b4c924a51a0
https://github.com/nanocoai/nanoclaw/pull/2478
https://www.vulncheck.com/advisories/nanoclaw-privilege-escalation-via-unverified-approval-response-handler
https://github.com/nanocoai/nanoclaw/pull/2478

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Source: NIST National Vulnerability Database (record CVE-2026-56402), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.