What is CVE-2026-57234?

CVE-2026-57234 is a low-severity vulnerability in Nokogiri, classified under Improper Handling of Case Sensitivity. CVSS score: 2.6/10. Published 2026-06-25.

How severe is CVE-2026-57234?

Low severity. CVSS v3 base score is 2.6 out of 10.

XXE in Nokogiri

CVE-2026-57234

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, the NONET parse option, which Nokogiri turns on by default for Nokogiri::XML::Schema (see CVE-2020-26247), was not correctly enforced on th…

EPSS: 0.002 (6.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 2.6 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N.

Affected products

Nokogiri
Sparklemotion Nokogiri — versions < 1.19.4

Weakness classification (CWE)

CWE-178 — Improper Handling of Case Sensitivity
CWE-184 — Incomplete List of Disallowed Inputs
CWE-611 — Improper Restriction of XML External Entity Reference (XXE)

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-57234?: CVE-2026-57234 is a low-severity vulnerability in Nokogiri, classified under Improper Handling of Case Sensitivity. CVSS score: 2.6/10. Published 2026-06-25.
How severe is CVE-2026-57234?: Low severity. CVSS v3 base score is 2.6 out of 10.