CVE-2026-17434

nanocoai NanoClaw add_mcp_server request.ts handleAddMcpServer improper authorization

State: Published
Severity: 5.3 Medium
Published: Jul 26, 2026
Updated: Jul 27, 2026
Reserved: Jul 25, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P	VulDB
3.1	6.3 Medium	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	VulDB
3.0	6.3 Medium	CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C	VulDB
2.0	6.5 Medium	AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C	VulDB

Weaknesses

CWE-285 Improper Authorization
CWE-266 Incorrect Privilege Assignment

Affected Products

Product	Versions
NanoClawnanocoai	2.0.0Affected 2.0.1Affected 2.0.2Affected 2.0.3Affected 2.0.4Affected 2.0.5Affected 2.0.6Affected 2.0.7Affected 2.0.8Affected 2.0.9Affected 2.0.10Affected 2.0.11Affected 2.0.12Affected 2.0.13Affected 2.0.14Affected 2.0.15Affected 2.0.16Affected 2.0.17Affected 2.0.18Affected 2.0.19Affected 2.0.20Affected 2.0.21Affected 2.0.22Affected 2.0.23Affected 2.0.24Affected and 40 more versions

References

VDB-383075 | nanocoai NanoClaw add_mcp_server request.ts handleAddMcpServer improper authorizationvdb-entrytechnical-description
VDB-383075 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
CVE-2026-17434 | CVE Analysis and Reportthird-party-advisory
Submit #862451 | NanoCoAI NanoClaw 2.0.64 Improper Authorization (CWE-285)third-party-advisory
https://github.com/nanocoai/nanoclaw/issues/2762exploitissue-tracking
https://github.com/nanocoai/nanoclaw/pull/2998issue-trackingpatch
https://github.com/nanocoai/nanoclaw/commit/e5b928783d5c485637565eb07d2967922dfbf8d8patch
https://github.com/nanocoai/nanoclaw/product

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