2450743 – (CVE-2026-4723) CVE-2026-4723 firefox: Use-after-free in the JavaScript Engine component

Bug 2450743 (CVE-2026-4723) - CVE-2026-4723 firefox: Use-after-free in the JavaScript Engine component

Summary: CVE-2026-4723 firefox: Use-after-free in the JavaScript Engine component

Keywords:
Status:	NEW
Alias:	CVE-2026-4723
Product:	Security Response
Classification:	Other
Component:	vulnerability
Sub Component:
Version:	unspecified
Hardware:	All
OS:	Linux
Priority:	medium
Severity:	medium
Target Milestone:	---
Assignee:	Product Security DevOps Team
QA Contact:
Docs Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+	depends on / blocked

Attachments	(Terms of Use)

Description OSIDB Bzimport 2026-03-24 13:03:32 UTC

Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 149.

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