CVE-2023-54354

high

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.

References

Advisories
More

https://www.vulncheck.com/advisories/nokogiri-before-null-pointer-dereference-via-libxml2

https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-pxvg-2qj5-37jq

https://github.com/GNOME/libxml2/commit/647e072ea0a2f12687fa05c172f4c4713fdb0c4f

https://github.com/GNOME/libxml2/commit/4c6922f763ad958c48ff66f82823ae21f2e92ee6

https://github.com/GNOME/libxml2/commit/09a2dd453007f9c7205274623acdd73747c22d64

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