YARD is a Ruby Documentation tool. Prior to version 0.9.42, a path traversal vulnerability was discovered in YARD when using yard server to serve documentation. This bug would allow unsanitized HTTP requests to access arbitrary files on the machine of a yard server host under certain conditions. This issue has been patched in version 0.9.42.

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has a package installed that is affected by a vulnerability as referenced in the USN-8394-1 advisory.

    It was discovered that YARD incorrectly sanitized paths in its built-in documentation server. An attacker     could possibly use this issue to read arbitrary files from the server host.

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.

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

  - YARD is a Ruby Documentation tool. Prior to version 0.9.42, a path traversal vulnerability was discovered     in YARD when using yard server to serve documentation. This bug would allow unsanitized HTTP requests to     access arbitrary files on the machine of a yard server host under certain conditions. This issue has been     patched in version 0.9.42. (CVE-2026-41493)

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

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - YARD is a Ruby Documentation tool. Prior to version 0.9.42, a path traversal vulnerability was discovered
    in YARD when using yard server to serve documentation. This bug would allow unsanitized HTTP requests to
    access arbitrary files on the machine of a yard server host under certain conditions. This issue has been
    patched in version 0.9.42. (CVE-2026-41493)

ID	Name	Product	Family	Type	Severity
319700	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : YARD vulnerability (USN-8394-1)	Nessus	Ubuntu Local Security Checks	Local	medium
313606	Linux Distros Unpatched Vulnerability : CVE-2026-41493	Nessus	Misc.	Local	medium
440604	SCA: security update for yard (GHSA-3jfp-46x4-xgfj)	Tenable Cloud Security	SCA Checks	Local	medium
440604	SCA: security update for yard (GHSA-3jfp-46x4-xgfj)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-41493

medium

Tenable Plugins

medium

medium

medium

medium