Bug 2492937 (CVE-2026-57436) - CVE-2026-57436 nokogiri: rubygem-nokogiri: Nokogiri: Denial of Service via heap use-after-free
Summary: CVE-2026-57436 nokogiri: rubygem-nokogiri: Nokogiri: Denial of Service via he...
Keywords:
Status: NEW
Alias: CVE-2026-57436
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-25 15:01 UTC by OSIDB Bzimport
Modified: 2026-06-29 08:40 UTC (History)
25 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-06-25 15:01:58 UTC 
Nokogiri is an open source XML and HTML library for the Ruby programming language. Prior to 1.19.4, Nokogiri::XML::Document#root= validated only that the new root was a Nokogiri::XML::Node, allowing a DTD node to be set as the document root. The result is a heap use-after-free during garbage collection or finalization, leading to an invalid memory read or potentially a segfault. This vulnerability is fixed in 1.19.4.
Note You need to log in before you can comment on or make changes to this bug.