High 8.2Published Jun 25, 2026

CVE-2026-57236Nokogiri is an open source XML and HTML library for the Ruby programming language.

Updated under an hour ago (2026-10-19 10:23 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for nokogiri

Exploited in the last 30 days

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: 8.2 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Analyzed
Record last updated: Jun 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nokogiri nokogiri nokogiri:nokogiri	before 1.19.4	NVD

References

https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-5v8h-3h3q-446pmitigation, vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.