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CRITICAL

CVE-2026-8450

CVSS v3

9.1

CRITICAL

EPSS Score

2.6 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • perl-HTTP-DaemonAlmaLinux:10all versions · fixed in 6.16-7.el10_2.1
  • perl-HTTP-DaemonAlmaLinux:9all versions · fixed in 6.12-6.el9_8.1
  • perl-HTTP-DaemonAlmaLinux:8all versions · fixed in 6.01-24.el8_10

Vendor advisories

  • CVE-2026-8450 Red Hat Product Security6 products fixed · 1 known affected

    perl-HTTP-Daemon: HTTP::Daemon: Arbitrary code execution via OS command injection in send_file()

    perl-HTTP-Daemon.src as a component of Red Hat Enterprise Linux 7

  • RHSA-2026:36187 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: perl-HTTP-Daemon security update

  • RHSA-2026:36189 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: perl-HTTP-Daemon security update

  • RHSA-2026:36188 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: perl-HTTP-Daemon security update

Full record on NVD

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.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Published
2026-05-27
Last Modified
2026-07-23

Frequently asked questions

What is 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(). 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.

Is CVE-2026-8450 actively exploited?

Active exploitation of CVE-2026-8450 has not been confirmed. Its EPSS score was 2.6% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-8450?

CVE-2026-8450 has a CVSS v3 base score of 9.1 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

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