CVE-2026-8450: Oalders Http::daemon

Critical severity, CVSS 9.1. EPSS: 2.6% chance of exploitation in the next 30 days.

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.

Affected products

• Oalders Http::daemon: before 6.17 (fixed in 6.17)
• Red Hat Red Hat Enterprise Linux 10: before 0:6.16-7.el10_2.1 (fixed in 0:6.16-7.el10_2.1)
• Red Hat Red Hat Enterprise Linux 7
• Red Hat Red Hat Enterprise Linux 8: before 0:6.01-24.el8_10 (fixed in 0:6.01-24.el8_10)
• Red Hat Red Hat Enterprise Linux 9: before 0:6.12-6.el9_8.1 (fixed in 0:6.12-6.el9_8.1)

Published 2026-05-27. Last modified 2026-07-23.