CVE-2023-54354 HIGH

CVE-2023-54354: Nokogiri before 1.14.3 Null Pointer Dereference via libxml2

Vendor Sparklemotion

Product nokogiri

Weakness CWE-476

Published August 25, 2026

Last update August 28, 2026

View on NVD All CVEs

CVSS base score

8.7/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality —

Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 25, 2026 CVE published

August 28, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2023-54354 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/476.html AskarLabs — CWE-476 write-up NULL Pointer Dereference