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CVE-2023-54354

7.5 · HIGH

Nokogiri before 1.14.3 (CRuby implementation only, when using the packaged libxml2) bundles libxml2 v2.10.3, which is vulnerable to NULL pointer dereferences in XML Schema processing (xmlSchemaFixu…

Published Aug 25, 2026CWE-476

Overview

CVE-2023-54354 is a high-severity vulnerability. It was published on August 25, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Nokogiri before 1.14.3 (CRuby implementation only, when using the packaged libxml2) bundles libxml2 v2.10.3, which is vulnerable to NULL pointer dereferences in XML Schema processing (xmlSchemaFixupComplexType, CVE-2023-28484, and xmlSchemaCheckCOSSTDerivedOK). An attacker who supplies a crafted/malformed XML schema can cause libxml2 to dereference a NULL pointer and potentially segfault, resulting in a denial of service. Nokogiri 1.14.3 upgrades the packaged libxml2 to v2.10.4 to resolve these issues.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/GNOME/libxml2/commit/09a2dd453007f9c7205274623acdd73747c22d64GitHubgithub.com/GNOME/libxml2/commit/4c6922f763ad958c48ff66f82823ae21f2e92ee6GitHubgithub.com/GNOME/libxml2/commit/647e072ea0a2f12687fa05c172f4c4713fdb0c4fGitHubgithub.com/sparklemotion/nokogiri/security/advisories/GHSA-pxvg-2qj5-37jqRefwww.vulncheck.com/advisories/nokogiri-before-null-pointer-dereference-via-libxml2

How CyberStrike helps

Frequently asked questions

What is CVE-2023-54354?

CVE-2023-54354 is a high-severity vulnerability. It was published on August 25, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-54354?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-54354?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-54354?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-54354 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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