# CVE-2026-7381

> Vulnerability · severity: **CRITICAL** (CVSS 9.1).

## Description

Plack::Middleware::XSendfile versions through 1.0053 for Perl can allow client-controlled path rewriting.

Plack::Middleware::XSendfile allows the variation setting (sendfile type) to be set by the client via the X-Sendfile-Type header, if it is not considered in the middleware constructor or the Plack environment.

A malicious client can set the X-Sendfile-Type header to "X-Accel-Redirect" to services running behind nginx reverse proxies, and then set the X-Accel-Mapping to map the path to an arbitrary file on the server.

Since 1.0053, Plack::Middleware::XSendfile is deprecated and will be removed from future releases of Plack.

This is similar to CVE-2025-61780 for Rack::Sendfile, although Plack::Middleware::XSendfile has some mitigations that disallow regular expressions to be used in the mapping, and only apply the mapping for the "X-Accel-Redirect" type.

## Key facts

- **CVE ID:** CVE-2026-7381
- **Published:** 2026-04-29
- **CVSS severity:** CRITICAL
- **CVSS base score:** 9.1
- **CWE codes:** CWE-200, CWE-441, CWE-913

## Affected products

- `miyagawa:plack\`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-7381

## Citation

> AI Analytics. CVE-2026-7381. Retrieved 2026-07-11 from https://api.ai-analytics.org/cve/CVE-2026-7381. Derived from NIST NVD. Licensed CC0.

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