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CVE-2026-57236

LOW
1.7
CVSS 4.0
Description
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.

Metadata

CVE ID
CVE-2026-57236
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-24 02:21 UTC
Published
2026-06-25 14:29 UTC
Last updated
2026-06-25 15:32 UTC
Primary CWE
CWE-416
CWE-416: Use After Free
Vendor / Product
sparklemotion / nokogiri
Sources
cve.org  ·  NVD

Severity & Metrics

1.7 LOW CVSS 4.0
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
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
sparklemotion nokogiri — < 1.19.4
Weakness (CWE)
CWESourceDescription
CWE-416 cna CWE-416: Use After Free
CVSS scores (1)
ScoreSeverityVersionSourceVector
1.7 LOW 4.0 cna 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
References (1)
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