CVE-2026-50557
MediumCVSS 6.1Exploitation Probability (EPSS)
Low risk11th percentile — higher than 11% of all known CVEs
Summary
A vulnerability in Angular allows bypassing HTML element and attribute sanitization using namespaces. An attacker can inject malicious JavaScript code that executes in the victim's browser, leading to XSS.
Risk Assessment
The risk involves arbitrary JavaScript execution in the user's session context, potentially leading to data theft, session hijacking, or other harmful actions.
Recommendation
Immediately update Angular to version 22.0.0-rc.2, 21.2.15, 20.3.22, or 19.2.22 depending on the branch in use.
Original NVD description (English source)
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 19.2.22, an issue in the @angular/compiler and @angular/core packages allows bypassing element and attribute sanitization/validation through specific namespace workarounds. Specifically, namespaced script elements (e.g., <svg:script> or <:svg:script>) were not properly identified as script elements by the Angular template preparser, allowing them to pass through template compilation without being stripped. Furthermore, security context schema mappings for element attributes did not consistently handle attributes within namespaced elements (like SVG and MathML), opening up gaps where malicious namespaced attributes could bypass runtime and compile-time sanitizers. Combined, these flaws enable an attacker who can inject or supply a template/tag structure with custom namespaces to bypass Angular's script-stripping logic and attribute sanitizers, leading to client-side Cross-Site Scripting (XSS). This vulnerability is fixed in 22.0.0-rc.2, 21.2.15, 20.3.22 and 19.2.22.