GD versions before 2.86 for Perl allow OS command injection and file overwrite via a 2-arg open() of filename arguments in _make_filehandle. GD::Image::_make_filehandle opens a filename argument with Perl's 2-arg open(), so a filename that begins or ends with a pipe ("| cmd", "cmd |") or begins with a redirect ("> path", ">> path") is run as a command or redirect rather than opened as a file. _make_filehandle is the single open path behind every filename-accepting constructor (new, newFromPng, newFromJpeg, and the rest); the in-memory *Data variants do not open a path and are unaffected. Any caller that forwards untrusted input to one of these constructors as a pathname can run an arbitrary command or truncate a file under the process UID.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1890 advisory.

    command injection via 2-arg open() in _make_filehandle (CVE-2026-11526)

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-GD installed on the remote host is prior to 2.49-3. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3387 advisory.

    command injection via 2-arg open() in _make_filehandle (CVE-2026-11526)

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 remote Debian 11 / 12 host has a package installed that is affected by a vulnerability as referenced in the dla-4638 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4638-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                 Salvatore Bonaccorso     June 21, 2026                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : libgd-perl     Version        : 2.73-1+deb11u1 2.76-4+deb12u1     CVE ID         : CVE-2026-11526

    A flaw was discovered in libgd-perl, a Perl module wrapper for libgd,     which may result in the execution of arbitrary shell commands or file     overwrite when processing specially crafted file names.

    For Debian 11 bullseye, this problem has been fixed in version     2.73-1+deb11u1.

    For Debian 12 bookworm, this problem has been fixed in version     2.76-4+deb12u1.

    We recommend that you upgrade your libgd-perl packages.

    For the detailed security status of libgd-perl please refer to its     security tracker page at:
    https://security-tracker.debian.org/tracker/libgd-perl

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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-2026-263adf0222 advisory.

    This update fixes a command injection issue resulting from the use of the 2-argument form of `open`     (CVE-2026-11526).

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 Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-63831abaee advisory.

    This update fixes a command injection issue resulting from the use of the 2-argument form of `open`     (CVE-2026-11526).

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 Debian 13 host has a package installed that is affected by a vulnerability as referenced in the dsa-6345 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6345-1                   security@debian.org     https://www.debian.org/security/                     Salvatore Bonaccorso     June 15, 2026                         https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : libgd-perl     CVE ID         : CVE-2026-11526

    A flaw was discovered in libgd-perl, a Perl module wrapper for libgd,     which may result in the execution of arbitrary shell commands or file     overwrite when processing specially crafted file names.

    For the stable distribution (trixie), this problem has been fixed in     version 2.78-1+deb13u1.

    We recommend that you upgrade your libgd-perl packages.

    For the detailed security status of libgd-perl please refer to its     security tracker page at:
    https://security-tracker.debian.org/tracker/libgd-perl

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

Tenable has extracted the preceding description block directly from the Debian 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.

  - GD versions before 2.86 for Perl allow OS command injection and file overwrite via a 2-arg open() of     filename arguments in _make_filehandle. GD::Image::_make_filehandle opens a filename argument with Perl's     2-arg open(), so a filename that begins or ends with a pipe (| cmd, cmd |) or begins with a redirect     (> path, >> path) is run as a command or redirect rather than opened as a file. _make_filehandle is     the single open path behind every filename-accepting constructor (new, newFromPng, newFromJpeg, and the     rest); the in-memory *Data variants do not open a path and are unaffected. Any caller that forwards     untrusted input to one of these constructors as a pathname can run an arbitrary command or truncate a file     under the process UID. (CVE-2026-11526)

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

ID	Name	Product	Family	Severity
322006	Amazon Linux 2023 : perl-GD (ALAS2023-2026-1890)	Nessus	Amazon Linux Local Security Checks	critical
321992	Amazon Linux 2 : perl-GD, --advisory ALAS2-2026-3387 (ALAS-2026-3387)	Nessus	Amazon Linux Local Security Checks	critical
321876	Debian dla-4638 : libgd-perl - security update	Nessus	Debian Local Security Checks	critical
321717	Fedora 44 : perl-GD (2026-263adf0222)	Nessus	Fedora Local Security Checks	critical
321636	Fedora 43 : perl-GD (2026-63831abaee)	Nessus	Fedora Local Security Checks	critical
321130	Debian dsa-6345 : libgd-perl - security update	Nessus	Debian Local Security Checks	critical
320441	Linux Distros Unpatched Vulnerability : CVE-2026-11526	Nessus	Misc.	critical

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