Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::NodeSet#[] (and its alias #slice) checked the requested index against the node set's bounds using a 32-bit-truncated copy of the index. A large negative index could pass the check and then be used at full width, reading outside the node set's storage. On CRuby this is an out-of-bounds read that typically crashes the process; on JRuby it is not memory-unsafe but returns an incorrect node. This vulnerability is fixed in 1.19.4.

An update of the rubygem package has been released.

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

  - Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4,     Nokogiri::XML::NodeSet#[] (and its alias #slice) checked the requested index against the node set's bounds     using a 32-bit-truncated copy of the index. A large negative index could pass the check and then be used     at full width, reading outside the node set's storage. On CRuby this is an out-of-bounds read that     typically crashes the process; on JRuby it is not memory-unsafe but returns an incorrect node. This     vulnerability is fixed in 1.19.4. (CVE-2026-57235)

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

ID	Name	Product	Family	Type	Severity
332554	Photon OS 5.0: Rubygem PHSA-2026-5.0-91-0911	Nessus	PhotonOS Local Security Checks	Local	medium
325379	Photon OS 4.0: Rubygem PHSA-2026-4.0-1051	Nessus	PhotonOS Local Security Checks	Local	medium
324558	Photon OS 5.0: Rubygem PHSA-2026-5.0-0911	Nessus	PhotonOS Local Security Checks	Local	medium
323622	Linux Distros Unpatched Vulnerability : CVE-2026-57235	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-57235

medium

Tenable Plugins

medium

medium

medium

medium