CVE-2026-57236: low-severity vulnerability in sparklemotion nokogiri
Nokogiri: Possible Use-After-Free when `Nokogiri::XML::Document#encoding=` raises an exception
Published
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8Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 1.7epss 0.4%
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, calling Document#encoding= with an invalid encoding (e.g., a non-string, or a string containing a null byte) raises an exception, but only after freeing the document's current encoding string without replacing it. The document is left referencing freed memory, so the next call to Document#encoding reads invalid memory, which can cause a segfault or leak freed bytes into a Ruby String. Affects the CRuby (libxml2) implementation only; JRuby is not affected. This vulnerability is fixed in 1.19.4.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
Affected products
sparklemotion · nokogiriRelated CVEs — sparklemotion nokogiri
In the same product, most dangerous first.
CVE-2022-24836HIGHInefficient Regular Expression Complexity in NokogiriEPSS 3.5%CVE-2022-29181HIGHImproper Handling of Unexpected Data Type in NokogiriEPSS 3.2%CVE-2022-23476HIGHUnchecked return value from xmlTextReaderExpand in NokogiriEPSS 1.8%CVE-2021-41098HIGHImproper Restriction of XML External Entity Reference (XXE) in Nokogiri on JRubyEPSS 1.5%CVE-2020-26247LOWXXE in NokogiriEPSS 1.2%CVE-2026-79770HIGHNokogiri before 1.19.3 ReDoS via CSS selector tokenizerEPSS 0.5%