Vulnerability · Published Jun 23, 2026 · Assigned by VulnCheck

CVE-2026-56694NanoClaw < 2.1.0 - Privilege Escalation via Forged Channel Approval Callback

Medium 5.4

In plain English

A medium-severity incorrect authorization in nanoclaw from nanocoai. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 22% of all known vulnerabilities).

Severity (CVSS 3.1)5.4Medium

Exploit odds (30 days)0.3%top 77.8% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

NanoClaw before 2.1.0 contains a privilege escalation vulnerability in the channel-registration approval flow where handleChannelApprovalResponse fails to validate admin privileges over target agent groups. Scoped admins can submit forged or stale connect callback values to wire messaging channels into out-of-scope agent groups, exposing unauthorized groups to unapproved channels and enabling unauthorized observation or control of restricted agent group activity.

Affected products (as reported)

Vendor	Product	Versions
nanocoai	nanoclaw	0 – before 2.1.0

Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References

Pull Request issue-tracking, patch
Patch Commit patch
https://www.vulncheck.com/advisories/nanoclaw-privilege-escalation-via-forged-channel-approval-callback third-party-advisory