EUVD-2026-49049
GHSA-m5r3-634q-m3rj
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization verification
MITRE ATT&CK
1 technique across 1 tactic: Defense Evasion The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
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Alert meAnalysisAIv1 – Jul 26, 2026
Improper authorization in nanocoai NanoClaw's add_mcp_server endpoint allows authenticated attackers with low privileges to bypass access controls and perform unauthorized actions, such as adding MCP servers without proper authorization. Versions up to and including 2.0.64 are affected, and publicly available exploit code exists. A vendor patch is available via commit e5b928783d5c485637565eb07d2967922dfbf8d8.
Affected VersionsENISA
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 1 package in euvd
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
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
Primary rating from Vendor (VulDB) · only source for this CVE.
CVSS VectorVendor: VulDB
Lifecycle Timeline
3DescriptionCVE.org
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.
Threat Intelligence Overview
NVD
CVE.org
EPSS
Vulnrichment
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Path traversal in NanoClaw's container filesystem boundary allows compromised containers or prompt-injected agents to es
Privilege escalation in NanoClaw before 2.1.17 lets remote attackers with a valid questionId approve or reject privilege
Symlink following in NanoClaw's agent-to-agent file forwarding exposes arbitrary host-readable files to container-contro
Privilege escalation in NanoClaw before 2.1.17 allows confined agent containers to bypass their architectural confinemen
Link-following (symlink) handling in NanoClaw's agent-to-agent attachment forwarding lets an authenticated, low-privileg
Improper privilege management in NanoClaw (versions up to 2.0.64) allows authenticated remote attackers to abuse the `ha
Improper authorization in NanoClaw's MCP Server Approval component allows local attackers to bypass security controls by
Privilege escalation in NanoClaw before 2.1.0 lets scoped admins cross agent-group authorization boundaries by submittin
Exploit-DB