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Fencer Vulns
critical 9.1

CVE-2026-8450 json

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

published 2026-05-27 5 mo ago modified 2026-07-23 3 mo ago also EUVD-2026-32050

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.4%
EPSS 1.4% chance of exploitation in 30 days, percentile 72%
public exploits
0
none known

Summary

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.

Patch / fix

  • OALDERS HTTP::Daemon 6.17
  • Red Hat Red Hat Enterprise Linux 10 0:6.16-7.el10_2.1
  • Red Hat Red Hat Enterprise Linux 8 0:6.01-24.el8_10
  • Red Hat Red Hat Enterprise Linux 9 0:6.12-6.el9_8.1
  • libhttp-daemon-perl Debian 12 6.16-1+deb13u1~deb12u1
  • libhttp-daemon-perl Debian 13 6.16-1+deb13u1
  • libhttp-daemon-perl Debian 14 6.17-1

debian advisories DEBIAN-CVE-2026-8450

  • libhttp-daemon-perl Ubuntu 22.04 LTS 6.13-1ubuntu0.2
  • libhttp-daemon-perl Ubuntu 24.04 LTS 6.16-1ubuntu0.24.04.1
  • libhttp-daemon-perl Ubuntu 25.10 6.16-1ubuntu0.25.10.1
  • libhttp-daemon-perl Ubuntu 26.04 LTS 6.16-1ubuntu0.26.04.1
  • libhttp-daemon-perl Ubuntu Pro 14.04 LTS 6.01-1ubuntu0.14.04~esm2
  • libhttp-daemon-perl Ubuntu Pro 16.04 LTS 6.01-1ubuntu0.16.04~esm2
  • libhttp-daemon-perl Ubuntu Pro 18.04 LTS 6.01-1ubuntu0.1+esm1
  • libhttp-daemon-perl Ubuntu Pro 20.04 LTS 6.06-1ubuntu0.1+esm1

ubuntu advisories UBUNTU-CVE-2026-8450

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • perl-HTTP-Daemon RHEL 8 6.01-24.el8_10
  • perl-HTTP-Daemon RHEL 10.2 6.16-7.el10_2.1
  • perl-HTTP-Daemon RHEL 9 6.12-6.el9_8.1

red hat advisories RHSA-2026:36188RHSA-2026:36189RHSA-2026:36187

  • perl-HTTP-Daemon SLES for SAP applications 16.0, SLES 16.0 6.16-160000.3.1
  • perl-HTTP-Daemon SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +8 more 6.01-150000.3.8.1
  • perl-HTTP-Daemon SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 6.01-9.8.1

suse advisories SUSE-SU-2026:22187-1SUSE-SU-2026:2442-1SUSE-SU-2026:2408-1

  • perl-HTTP-Daemon openSUSE Leap 16.0 6.16-160000.3.1
  • perl-HTTP-Daemon openSUSE Tumbleweed 6.170.0-1.1

opensuse advisories openSUSE-SU-2026:21119-1openSUSE-SU-2026:10938-1

  • perl-HTTP-Daemon AlmaLinux 9 6.12-6.el9_8.1
  • perl-HTTP-Daemon AlmaLinux 8 6.01-24.el8_10
  • perl-HTTP-Daemon AlmaLinux 10 6.16-7.el10_2.1

almalinux advisories ALSA-2026:36187ALSA-2026:36188ALSA-2026:36189

  • perl-HTTP-Daemon Rocky Linux 10 6.16-7.el10_2.1
  • perl-HTTP-Daemon Rocky Linux 9 6.12-6.el9_8.1
  • perl-HTTP-Daemon Rocky Linux 8 6.01-24.el8_10

rocky linux advisories RLSA-2026:36189RLSA-2026:36187RLSA-2026:36188

  • perl-HTTP-Daemon Azure Linux 3.0 6.16-2

azure linux advisories AZL-93024

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-8450 updated cvss 8.1

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

  • Red Hat Enterprise Linux 7 perl-HTTP-Daemon
    affected: no fix available
  • Red Hat CodeReady Linux Builder EUS (v.9.6) perl-HTTP-Daemon 6.12-6.el9_6.1
    fixed: vendor fix RHSA-2026:93586
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) perl-HTTP-Daemon 6.12-6.el9_8.1
    fixed: vendor fix RHSA-2026:36187
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) perl-HTTP-Daemon 6.16-7.el10_2.1
    fixed: vendor fix RHSA-2026:36189
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) perl-HTTP-Daemon 6.16-7.el10_0.1
    fixed: vendor fix RHSA-2026:93585
  • Red Hat Enterprise Linux CRB (v. 8) perl-HTTP-Daemon 6.01-24.el8_10
    fixed: vendor fix RHSA-2026:36188

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
5 mo ago

Exploit prediction

1.40% chance of exploitation in the next 30 days, higher than 72% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADP 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CNA 3.1 8.1 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • OALDERS HTTP::Daemon
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 7

Classification

Weakness
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command
  • CWE-73 External Control of File Name or Path

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.