CVE-2022-50998

high

Description

Nokogiri before 1.13.9 (CRuby implementation using packaged libraries) bundles libxml2 v2.9.14, which is affected by CVE-2022-40304 (data corruption / double-free from an entity reference cycle when entity content is allocated from a dict) and CVE-2022-40303 (integer overflows when parsing with XML_PARSE_HUGE). Nokogiri 1.13.9 upgrades the packaged libxml2 to v2.10.3 to address these issues. Processing crafted XML input may lead to denial of service or memory corruption. (The advisory also references CVE-2022-2309, a NULL pointer dereference via iterwalk/canonicalize, which maintainers determined does not affect Nokogiri users.)

References

Advisories
More

https://www.vulncheck.com/advisories/nokogiri-before-multiple-vulnerabilities-via-libxml2-2

https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-2qc6-mcvw-92cw

https://github.com/GNOME/libxml2/commit/c846986356fc149915a74972bf198abc266bc2c0

https://github.com/GNOME/libxml2/commit/644a89e080bced793295f61f18aac8cfad6bece2

Details

Source: Mitre, NVD

Published: 2026-08-25

Updated: 2026-09-01

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Severity: High

CVSS v4

Base Score: 8.7

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

Severity: High

EPSS

EPSS: 0.0035