Vulnerability · Published May 27, 2026 · Assigned by CPANSec
CVE-2026-8450HTTP::Daemon versions before 6.17 for Perl allow OS command injection via send_file()
Critical 9.1
In plain English
A critical-severity OS command injection in HTTP::Daemon from OALDERS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.4% (higher than 73% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:10 | perl-HTTP-Daemon | 6.16-7.el10_2.1 | ALSA-2026:36189 |
| AlmaLinux:8 | perl-HTTP-Daemon | 6.01-24.el8_10 | ALSA-2026:36188 |
| AlmaLinux:9 | perl-HTTP-Daemon | 6.12-6.el9_8.1 | ALSA-2026:36187 |
| Debian:12 | libhttp-daemon-perl | 6.16-1+deb13u1~deb12u1 | DEBIAN-CVE-2026-8450 |
| Debian:13 | libhttp-daemon-perl | 6.16-1+deb13u1 | DEBIAN-CVE-2026-8450 |
| Debian:14 | libhttp-daemon-perl | 6.17-1 | DEBIAN-CVE-2026-8450 |
| Rocky Linux:10 | perl-HTTP-Daemon | 0:6.16-7.el10_2.1 | RLSA-2026:36189 |
| Rocky Linux:8 | perl-HTTP-Daemon | 0:6.01-24.el8_10 | RLSA-2026:36188 |
| Rocky Linux:9 | perl-HTTP-Daemon | 0:6.12-6.el9_8.1 | RLSA-2026:36187 |
| Ubuntu:22.04:LTS | libhttp-daemon-perl | 6.13-1ubuntu0.2 | UBUNTU-CVE-2026-8450 |
| Ubuntu:24.04:LTS | libhttp-daemon-perl | 6.16-1ubuntu0.24.04.1 | UBUNTU-CVE-2026-8450 |
| Ubuntu:25.10 | libhttp-daemon-perl | 6.16-1ubuntu0.25.10.1 | UBUNTU-CVE-2026-8450 |
| Ubuntu:26.04:LTS | libhttp-daemon-perl | 6.16-1ubuntu0.26.04.1 | UBUNTU-CVE-2026-8450 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| OALDERS | HTTP::Daemon | 0 – before 6.17 |
Weakness: CWE-78, CWE-73 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
References
- https://github.com/libwww-perl/HTTP-Daemon/pull/89 issue-tracking
- https://github.com/libwww-perl/HTTP-Daemon/commit/945d35141d94490f749640bd4390acd6a2193995.patch patch
- https://metacpan.org/release/OALDERS/HTTP-Daemon-6.17/changes release-notes
- 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/security/cve/CVE-2026-8450 vdb-entry, x_refsource_REDHAT
- RHBZ#2481773 issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-8450.json x_sadp-csaf-vex
- https://access.redhat.com/errata/RHSA-2026:36189 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:36188 vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:36187 vendor-advisory, x_refsource_REDHAT