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.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has a package installed that is affected by a vulnerability as referenced in the SUSE-SU-2026:2442-1 advisory.

    - CVE-2026-8450: Fixed OS command injection via send_file() (bsc#1266370).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-f276b2154e advisory.

    Changes:

    6.17      2026-05-19 23:11:06Z

      - Fix CVE-2026-8450 (affects 6.15 and earlier): 2-arg open() in         send_file() enabled RCE / arbitrary file write / response-body         exfiltration when a string argument was derived from attacker-         influenced input. send_file() now uses 3-arg open() with an         explicit '<' read mode, so the path is always treated as a literal         filename and 2-arg open() shell-magic shapes ('| cmd', 'cmd |',         '> path', etc.) are no longer interpreted. send_file() now also         returns '0E0' (true zero) on a successful zero-byte transfer so         callers can distinguish empty file from open failure (undef). See         https://www.cve.org/CVERecord?id=CVE-2026-8450 for the advisory.
        Reported and patched by Stig Palmquist (stigtsp). (Stig Palmquist,         Olaf Alders)

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES12 host has a package installed that is affected by a vulnerability as referenced in the SUSE- SU-2026:2408-1 advisory.

    - CVE-2026-8450: Fixed OS command injection via send_file() (bsc#1266370).

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-8982379b5c advisory.

    Changes:

    6.17      2026-05-19 23:11:06Z

      - Fix CVE-2026-8450 (affects 6.15 and earlier): 2-arg open() in         send_file() enabled RCE / arbitrary file write / response-body         exfiltration when a string argument was derived from attacker-         influenced input. send_file() now uses 3-arg open() with an         explicit '<' read mode, so the path is always treated as a literal         filename and 2-arg open() shell-magic shapes ('| cmd', 'cmd |',         '> path', etc.) are no longer interpreted. send_file() now also         returns '0E0' (true zero) on a successful zero-byte transfer so         callers can distinguish empty file from open failure (undef). See         https://www.cve.org/CVERecord?id=CVE-2026-8450 for the advisory.
        Reported and patched by Stig Palmquist (stigtsp). (Stig Palmquist,         Olaf Alders)

Tenable has extracted the preceding description block directly from the Fedora security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-8419-1 advisory.

    It was discovered that HTTP-Daemon incorrectly handled untrusted input under certain circumstances. A     remote attacker could possibly use this issue to execute arbitrary commands, create or overwrite arbitrary     files, or expose sensitive information.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1794 advisory.

    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. (CVE-2026-8450)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of perl-HTTP-Daemon installed on the remote host is prior to 6.01-8. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3341 advisory.

    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. (CVE-2026-8450)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-8450)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
321753	SUSE SLED15 / SLES15 Security Update : perl-HTTP-Daemon (SUSE-SU-2026:2442-1)	Nessus	SuSE Local Security Checks	critical
321732	Fedora 43 : perl-HTTP-Daemon (2026-f276b2154e)	Nessus	Fedora Local Security Checks	critical
321644	SUSE SLES12 Security Update : perl-HTTP-Daemon (SUSE-SU-2026:2408-1)	Nessus	SuSE Local Security Checks	critical
321631	Fedora 44 : perl-HTTP-Daemon (2026-8982379b5c)	Nessus	Fedora Local Security Checks	critical
320590	Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : HTTP-Daemon vulnerability (USN-8419-1)	Nessus	Ubuntu Local Security Checks	critical
319879	Amazon Linux 2023 : perl-HTTP-Daemon, perl-HTTP-Daemon-tests (ALAS2023-2026-1794)	Nessus	Amazon Linux Local Security Checks	critical
319797	Amazon Linux 2 : perl-HTTP-Daemon, --advisory ALAS2-2026-3341 (ALAS-2026-3341)	Nessus	Amazon Linux Local Security Checks	critical
317090	Linux Distros Unpatched Vulnerability : CVE-2026-8450	Nessus	Misc.	critical

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