CVE-2026-8450
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().
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 1.40% probability · 71th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-73, CWE-78
- Source
- 9b29abf9-4ab0-4765-b253-1875cd9b441e
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.