Is CVE-2026-57234 in the CISA KEV catalog?

No. CVE-2026-57234 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-57234?

CVE-2026-57234 has a CVSS v3 base score of 2.6 (Low).

What is the EPSS score for CVE-2026-57234?

CVE-2026-57234 has an EPSS score of 0.17% (6th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-57234?

Upgrade ruby-nokogiri on debian unstable to 1.19.4+dfsg-1 or later.

CVE & CISA-KEV Catalog

CVE-2026-57234

LOW

2.6

CVSS v3

NVD

Description

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 the JRuby implementation. As a result, a schema parsed with default options could still cause external resources to be fetched over the network, potentially enabling SSRF or XXE attacks. This vulnerability is fixed in 1.19.4.

CWE-178 CWE-184 CWE-611XML External Entity (XXE)

How to fix

Remediation Available

ruby-nokogiriDebian

Fixed in:1.19.4+dfsg-1CVE-2026-57234

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredLow

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.17%probability of exploitation in 30 days

6thpercentile

Low risk: more likely to be exploited than 6% of all known CVEs.

References

Vendor Advisory1

github.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-26.