Bug 2491412 (CVE-2026-52725)

Summary: CVE-2026-52725 @angular/core: @angular/core: Cross-Site Scripting (XSS) via dynamic component creation bypass
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: amctagga, aoconnor, bniver, ewittman, flucifre, gmalinko, gmeno, gotiwari, gparvin, groman, janstey, jhorak, mbenjamin, mhackett, mvyas, nipatil, pahickey, pantinor, pdelbell, rhaigner, rhel-process-autobot, rkubis, rstepani, sostapov, vereddy, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the @angular/core component. This vulnerability allows an attacker to bypass security restrictions when creating dynamic components. By manipulating the host element or selector, an attacker can force an Angular component to be mounted directly onto a script tag. This can result in the execution of untrusted code or client-side Cross-Site Scripting (XSS), potentially compromising user data or system integrity.
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Description OSIDB Bzimport 2026-06-22 16:02:05 UTC 
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 22.0.0-rc.2, 21.2.15, 20.3.22, and 19.2.23, an issue in the @angular/core package allows bypassing script-execution restrictions during dynamic component creation. Specifically, the dynamic component instantiation mechanism (createComponent) failed to reject mounting components directly onto a <script> or namespaced script element (such as <svg:script>). This enabled the initialization of custom components on a tag that executes scripts, allowing attackers to hijack or inject script-executing hosts. This flaw enables an attacker who can control the host element or selector parameter passed to createComponent to initialize or mount an Angular component directly onto a <script> tag, leading to execution of untrusted code or client-side Cross-Site Scripting (XSS). This vulnerability is fixed in 22.0.0-rc.2, 21.2.15, 20.3.22, and 19.2.23.