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CVE-2023-54354 sparklemotion CVE debrief

The Nokogiri library, prior to version 1.14.3, is vulnerable to NULL pointer dereferences during XML Schema processing due to the bundled libxml2 version 2.10.3. This issue, related to CVE-2023-28484, can be exploited by providing a crafted or malformed XML schema, potentially leading to a denial of service through a segfault. Developers and administrators should be aware of this vulnerability and take necessary actions to upgrade or mitigate the risk. The CVE record was published on 2026-08-25T16:16:44.543Z and has not been modified since then.

Vendor
sparklemotion
Product
nokogiri
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-25
Original CVE updated
2026-09-01
Advisory published
2026-08-25
Advisory updated
2026-09-01

Who should care

Developers and administrators using Nokogiri versions prior to 1.14.3 should be aware of this vulnerability and take necessary actions to upgrade or mitigate the risk. This includes reviewing and updating inventory to ensure all affected systems are patched, and implementing compensating controls such as monitoring and exception tracking.

Technical summary

The Nokogiri library, when using the packaged libxml2 version prior to 1.14.3, is vulnerable to NULL pointer dereferences during XML Schema processing. This issue arises from the bundled libxml2 version 2.10.3, which is susceptible to CVE-2023-28484. An attacker could exploit this by providing a crafted or malformed XML schema, potentially leading to a denial of service through a segfault. The vulnerability is resolved in Nokogiri version 1.14.3, which upgrades the packaged libxml2 to version 2.10.4.

Defensive priority

High-priority defensive actions are required due to the high CVSS score of 8.7 and the potential for denial of service attacks.

Recommended defensive actions

  • Upgrade Nokogiri to version 1.14.3 or later to resolve the vulnerability.
  • Implement compensating controls, such as monitoring and exception tracking, to detect potential attacks.
  • Review and update inventory to ensure all affected systems are patched.
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
  • Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
  • Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE-2023-54354 record indicates that Nokogiri before version 1.14.3, when using the packaged libxml2, is vulnerable to NULL pointer dereferences in XML Schema processing. This could lead to a denial of service. The issue is resolved in Nokogiri version 1.14.3, which upgrades the packaged libxml2 to version 2.10.4. Evidence is limited to CVE and NVD sources, and defenders should verify affected scope and vendor guidance.

Sources and references

Verified primary and authoritative sources

  • CVE-2023-54354 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2023-54354

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2023-54354 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2023-54354

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.