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Critical severity9.8OSV Advisory· Published Aug 16, 2019· Updated Jun 17, 2026

CVE-2019-5477

CVE-2019-5477

Description

A command injection vulnerability in Nokogiri v1.10.3 and earlier allows commands to be executed in a subprocess via Ruby's Kernel.open method. Processes are vulnerable only if the undocumented method Nokogiri::CSS::Tokenizer#load_file is being called with unsafe user input as the filename. This vulnerability appears in code generated by the Rexical gem versions v1.0.6 and earlier. Rexical is used by Nokogiri to generate lexical scanner code for parsing CSS queries. The underlying vulnerability was addressed in Rexical v1.0.7 and Nokogiri upgraded to this version of Rexical in Nokogiri v1.10.4.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
nokogiriRubyGems
< 1.10.41.10.4
rexicalRubyGems
< 1.0.71.0.7

Affected products

183

Patches

Vulnerability mechanics

References

15

News mentions

0

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