CVE-2026-7381

Summary

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.

Affected Software

VendorProductVersion RangeStatus
MIYAGAWAPlack::Middleware::XSendfile0 <= 1.0053affected

Weaknesses

  • CWE-200: CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-441: CWE-441 Unintended Proxy or Intermediary
  • CWE-913: CWE-913 Improper Control of Dynamically-Managed Code Resources

Workarounds

Users can configure the X-Sendfile-Type in the middleware constructor, and the reverse proxy to unset the X-Sendfile-Type header and (on nginx) the X-Accel-Mapping request header.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: total

References