What’s Vulnerable › Vulnerabilities

CVE-2026-8450: HTTP::Daemon versions before 6.17 for Perl allow OS command injection via send_file()

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-27 · updated 2026-07-23
• Weakness: CWE-73

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.

Affected products

• OALDERS HTTP::Daemon: before 6.17 — fixed in 6.17

How to fix

Upgrade to a fixed version: OALDERS HTTP::Daemon 6.17. Check the vendor advisory for mitigations.

References

• https://github.com/libwww-perl/HTTP-Daemon/commit/945d35141d94490f749640bd4390acd6a2193995.patch
• 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

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