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Vulnerability · Published Jul 26, 2026 · Assigned by VulDB

CVE-2026-17434nanocoai NanoClaw add_mcp_server request.ts handleAddMcpServer improper authorization

Medium 6.3

In plain English

A medium-severity security flaw in NanoClaw from nanocoai. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 32% of all known vulnerabilities).

Severity (CVSS 3.1)6.3Medium
Exploit odds (30 days)0.4%top 68.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

A flaw has been found in nanocoai NanoClaw up to 2.0.64. Affected is the function handleAddMcpServer of the file src/modules/self-mod/request.ts of the component add_mcp_server. Executing a manipulation can lead to improper authorization. The attack may be launched remotely. The exploit has been published and may be used. This patch is called e5b928783d5c485637565eb07d2967922dfbf8d8. A patch should be applied to remediate this issue.

Affected products (as reported)

VendorProductVersions
nanocoai NanoClaw 2.0.02.0.12.0.22.0.32.0.42.0.52.0.62.0.7

Weakness: CWE-285, CWE-266 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

References