Pillow is a Python imaging library. Prior to 12.3.0, WindowsViewer.get_command() constructed a cmd.exe shell command by directly embedding a file path into an f-string without escaping and passed the result to subprocess.Popen(..., shell=True), allowing shell metacharacters in the file path to inject arbitrary cmd.exe commands. This issue is fixed in version 12.3.0.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-fc2ded926e advisory.

    Backport fixes for CVE-2026-59197 and CVE-2026-54058.

    ----

    Fix CVE-2026-55380, CVE-2026-54060, CVE-2026-54059, CVE-2026-55379, CVE-2026-55798

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

Note that Nessus has not tested for these issues 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 multiple vulnerabilities as referenced in the FEDORA-2026-46c4892063 advisory.

    Fix CVE-2026-55380, CVE-2026-54060, CVE-2026-54059, CVE-2026-55379, CVE-2026-55798

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

Note that Nessus has not tested for these issues 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.

  - Pillow is a Python imaging library. Prior to 12.3.0, WindowsViewer.get_command() constructed a cmd.exe     shell command by directly embedding a file path into an f-string without escaping and passed the result to     subprocess.Popen(..., shell=True), allowing shell metacharacters in the file path to inject arbitrary     cmd.exe commands. This issue is fixed in version 12.3.0. (CVE-2026-55798)

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

ID	Name	Product	Family	Severity
328435	Fedora 43 : python-pillow (2026-fc2ded926e)	Nessus	Fedora Local Security Checks	high
326367	Fedora 44 : python-pillow (2026-46c4892063)	Nessus	Fedora Local Security Checks	medium
325512	Linux Distros Unpatched Vulnerability : CVE-2026-55798	Nessus	Misc.	medium

Detections

Analytics

CVE-2026-55798

medium

Tenable Plugins

high

medium

medium