ecstatic@3.3.2 vulnerabilities

A simple static file server middleware

Direct Vulnerabilities

Known vulnerabilities in the ecstatic package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
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Denial of Service (DoS)

ecstatic is a simple static file server middleware. Use it with a raw http server, express/connect or on the CLI.

Affected versions of this package are vulnerable to Denial of Service (DoS). It is possible to crash a server using the package due to the way URL params parsing is handled during redirect.


curl --path-as-is $(echo -e -n "\x0cfoo")

In the PoC the library is trying to redirect /existing-dir-name?\x0cfoo to /existing-dir-name/?\x0cfoo which cause TypeError: The header content contains invalid characters error because of \x0c symbol.

How to fix Denial of Service (DoS)?

Upgrade ecstatic to version 4.1.4 or higher.