CVE-2026-8450CWE-73CWE-78

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

Critical · published May 27, 2026

CVSS v3.1
9.1
EPSS
3%
Percentile
85.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.02614 · 85.3th percentile
Weaknesses
CWE-73 · External Control of File Name or Path; CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-05-27T04:22Z
EPSS history
Timeline
  • 27 MAY 04:22Z
    HTTP::Daemon versions before 6.17 for Perl allow OS command injection via send_file()
    cvelistv5