Skip to content
VulniPulse
Sign in
Advisory severityLow2.9Red Hat Linux

Low [CVE-2026-57434] Denial of Service via NULL pointer dereference

This low-severity Red Hat Linux advisory covers CVE-2026-57434 affecting Red Hat 3scale API Management Platform 2, Red Hat Satellite 6.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

CVE-2026-57434 Source published Source updated

VulniPulse record published Record updated

CVE-2026-57434
Affected products & platforms
Red Hat LinuxUnclassified
Open source advisory

Summary

Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri contains a bug when calling certain methods on allocated-but-uninitialized native wrapper classes that inherit from Nokogiri::XML::Node.

This caused a NULL pointer dereference that could crash the process. This vulnerability is fixed in 1.19.4.

An attacker who can control the construction of Nokogiri node objects could exploit this to cause a Denial of Service. Red Hat severity: Low — CVSS 2.9 (CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L).

Weakness: CWE-476. Affected Red Hat products: Red Hat 3scale API Management Platform 2; Red Hat Satellite 6.

Red Hat does not currently list a fixing RHSA for this CVE.

Is CVE-2026-57434 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-57434 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-57434?

Upgrade to a fixed release named by Red Hat:

  • 1.19.4

Confirm against the vendor advisory before you patch.

Affected versions
  • < 1.19.4

Official advisory · high-confidence parse· fetched 16 days ago·verify at source

Fixed versions
  • 1.19.4

Official advisory · high-confidence parse· fetched 16 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • There is no mitigation for this flaw other than updating to Nokogiri version 1.19.4 or later. As a workaround, ensure that untrusted input cannot trigger the construction of uninitialized native wrapper classes inheriting from Nokogiri::XML::Node.

Official advisory · high-confidence parse· fetched 16 days ago·verify at source

Get an email when Red Hat publishes the next one.

See Red Hat's last 90 days of advisories first. Then choose one product with live alerts free for life, or a free month of real-time alerts on everything with the severity, the fixed version and the vendor's link (card needed, then US$15/month; we email you before the first charge).

Alert me about Red Hat

More Red Hat Linux advisories

All Red Hat Linux advisories

iPhone and Android apps · New on the App Store

Monitor future Red Hat Linux CVEs from your phone.

Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 34 official vendor sources and 160+ reviewed platform categories.

Download on the App StoreGet CVE alerts on AndroidSee app features

Discussion(0)

No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.

Sign in to join the discussion.