Information disclosure in Miyagawa Plack\
CVE-2026-7381
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.
Vulnerability class: Information Disclosure
EPSS: 0.004 (37.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Miyagawa Plack\ — versions \
- Miyagawa Plack::middleware::xsendfile — versions 0
- Miyagawa Plack\:\:middleware\:\:xsendfile
Weakness classification (CWE)
References
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (release-notes, Release Notes)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (Product, technical-description)
- 9b29abf9-4ab0-4765-b253-1875cd9b441e (related, US Government Resource)
Frequently asked questions
- What is CVE-2026-7381?
- CVE-2026-7381 is a critical-severity vulnerability in Miyagawa Plack\, classified under Information Disclosure. CVSS score: 9.1/10. Published 2026-04-29.
- How severe is CVE-2026-7381?
- Critical severity. CVSS v3 base score is 9.1 out of 10.