What is CVE-2026-56402?

CVE-2026-56402 is a medium-severity vulnerability in Nanocoai Nanoclaw, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-06-23.

How severe is CVE-2026-56402?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Nanocoai Nanoclaw

CVE-2026-56402

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…

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.

Affected products

Nanocoai Nanoclaw — versions 0, 2.1.17

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-56402?: CVE-2026-56402 is a medium-severity vulnerability in Nanocoai Nanoclaw, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-06-23.
How severe is CVE-2026-56402?: Medium severity. CVSS v3 base score is 6.5 out of 10.