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Advisories

Nokogiri before 1.19.3 ReDoS via CSS selector tokenizer

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severity
high
date
Affecting

  • nokogiri >= 0, < 1.19.3

CWE
  • CWE-1333 Inefficient Regular Expression Complexity
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Credit
colby-swandale, flavorjones
Description
Nokogiri versions before 1.19.3 contain regular expression denial of service vulnerabilities in the CSS selector tokenizer affecting string-literal and identifier tokenization. Attackers can inject adversarial CSS selectors into methods like Node#css, Node#at_css, and Searchable#search to cause exponential regex backtracking and denial of service.

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