CVE-2026-8450Critical· 9.1▾ Midnight

HTTP::Daemon versions before 6.17 for Perl allow OS command injection via send_file(). send_file() opens its string argument with Perl's 2-arg open()

HTTP::Daemon versions before 6.17 for Perl allow OS command injection via send_file(). send_file() opens its string argument with Perl's 2-arg open(). The 2-arg form interprets magic prefixes: '| cmd' and 'cmd |' open a pipe to a subpro…

▾ Midnight zone — Critical, or high with PoC / in-the-wild

Depth score50/ 100 · Moderate

impact 50.1 · likelihood 0.3 · exploitation 0

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Proof of concept

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Published

May 27, 2026

Updated

Jul 7, 2026

CVSS

9.1

Vendor

—

Product

—

CWE

CWE-73, CWE-78, CWE-78

Depth score

50 · Moderate

EPSS

1.4% · p72

Platforms

—

Source

NVD

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS history

Exploit-prediction probability, daily snapshots since Aug 1.

1.4% → 1.4%

Timeline

Disclosure to exploitation, from the record and what we observed since indexing it.

4 events · 121 days

May 27, 2026Published
Disclosed via NVD
Jul 7, 2026Record revised
Last analysed / modified upstream
Aug 1, 2026EPSS first tracked
1.4%
Sep 25, 2026EPSS peak
1.4% → 2.6%

CWE-73 CWE-78 CWE-78 #nvd

Full technical detail▾

Overview

HTTP::Daemon versions before 6.17 for Perl allow OS command injection via send_file().

send_file() opens its string argument with Perl's 2-arg open(). The 2-arg form interprets magic prefixes: '| cmd' and 'cmd |' open a pipe to a subprocess, '> path' and '>> path' open the path for write or append.

Untrusted input passed to send_file() can run OS commands at the daemon process UID. The read-pipe form ('cmd |') also leaks subprocess stdout into the HTTP response body. The write-mode forms can create or truncate files at attacker chosen paths.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

References

Related vulnerabilities

Connected by shared product, vendor, weakness, or advisory.

#nvd

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