Vulnerability 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.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/libwww-perl/HTTP-Daemon/commit/945d35141d94490f749640bd4390ac
- https://github.com/libwww-perl/HTTP-Daemon/pull/89
- https://metacpan.org/release/OALDERS/HTTP-Daemon-6.17/changes
- http://www.openwall.com/lists/oss-security/2026/05/27/5
- https://lists.debian.org/debian-lts-announce/2026/06/msg00028.html
- https://access.redhat.com/errata/RHSA-2026:36187
- https://access.redhat.com/errata/RHSA-2026:36188
- https://access.redhat.com/errata/RHSA-2026:36189
- https://access.redhat.com/security/cve/CVE-2026-8450
- https://bugzilla.redhat.com/show_bug.cgi?id=2481773
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8450.json
FAQ
What is CVE-2026-8450?
CVE-2026-8450 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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...
How severe is CVE-2026-8450?
CVE-2026-8450 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-8450?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.