CVE-2026-7381: Plack::Middleware::XSendfile versions through 1.0053 for Perl can allow client-controlled path rewriting. Pla

Q: How do I fix CVE-2026-7381?

plack\: upgrade to newer than 1.0053. Exact commands for each OS are on this page.

Q: Is CVE-2026-7381 being exploited?

CVE-2026-7381 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-7381 affect?

CVE-2026-7381 affects plack\. Severity is critical (CVSS 9.1). 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

Q: How urgent is CVE-2026-7381?

Priority 46/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2026-7381 is a critical-severity flaw (CVSS 9.1) affecting plack\. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 th

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-200, CWE-441, CWE-913
Published	2026-04-29
Last modified	2026-10-26

Publisher (CNA): CPANSec · Vendor: miyagawa

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-29 23:16 UTCPublished CVE record published
2026-10-26 20:10 UTCUpdated Record last modified

miyagawa plack\ UPGRADE

Affected: <= 1.0053

Fixed in: newer than 1.0053

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy plack || rpm -q plack || plack --version

2. UPGRADE to newer than 1.0053 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade plack

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade plack

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-7381?

plack\: upgrade to newer than 1.0053. Exact commands for each OS are on this page.

Is CVE-2026-7381 being exploited?

CVE-2026-7381 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-7381 affect?

CVE-2026-7381 affects plack\. Severity is critical (CVSS 9.1). 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

How urgent is CVE-2026-7381?

Priority 46/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

nginx vulnerabilities · Perl vulnerabilities

References

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