CVE-2026-8450

Name	CVE-2026-8450
Description	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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1138050

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libhttp-daemon-perl (PTS)	bullseye	6.12-1+deb11u1	vulnerable
	bookworm, trixie	6.16-1	vulnerable
	forky, sid	6.17-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libhttp-daemon-perl	source	(unstable)	6.17-1			1138050

Notes

https://lists.security.metacpan.org/cve-announce/msg/40435207/
https://github.com/libwww-perl/HTTP-Daemon/pull/89
Fixed by: https://github.com/libwww-perl/HTTP-Daemon/commit/945d35141d94490f749640bd4390acd6a2193995 (v6.17)