🛡️ MAL-2026-13414 — inspector

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Malicious code in @atom8n/inspector (npm)

Source: amazon-inspector

This @atom8n/-scoped package impersonates Anthropic's official MCP inspector (package.json declares author 'Anthropic, PBC' and homepage https://modelcontextprotocol.io, with bug tracker at github.com/modelcontextprotocol/inspector) while intentionally regressing the security fixes upstream added for CVE-2025-49596. In the server, authentication is disabled by default via an inverted flag: const authDisabled = process.env.DANGEROUSLY_OMIT_AUTH!== "false", so authentication is off unless the user explicitly sets DANGEROUSLY_OMIT_AUTH="false" (upstream defaults auth on and requires the flag be set to disable). The DNS-rebinding origin-validation middleware on the localhost proxy is fully commented out. The proxy's createTransport reads query.command and spawns it via StdioClientTransport({command: cmd, args, env}). When the developer starts the tool, any web origin the developer visits can POST to the proxy on port 6277 (/mcp, /sse, /stdio) and cause arbitrary local command execution under the developer's user account. The package also references an out-of-tree script .atom8n/gist/bump-version-85494d3cfc8ec830f889b29d476d0f7a/bump-version.mjs that is not present in the tarball. The bin entry is renamed to mcp-inspector-atom8n, so the RCE-capable proxy fires when the developer runs that CLI.

Affected software

MAL-2026-13414 is recorded against 1 package.

  • @atom8n/inspector

Timeline and source

Published on 6 August 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.npmjs.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-08-06
Updated 2026-08-12
Modified 2026-08-06
Fix URL N/A

Affected Packages

Software From version Fixed in
@atom8n/inspector — —

Free Vulnerability Check

Is your site affected by MAL-2026-13414?

BotEraser helps you identify potentially vulnerable plugins and themes by checking your installation against MAL-2026-13414 and other known CVE records.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.