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.

According to its self-reported version number, Angular is prior to 19.0.0, 19.x prior to 19.2.23, 20.x prior to 20.3.22 or 21.x prior to 21.2.15. It is, therefore, affected by multiple vulnerabilities:

- A sanitization bypass vulnerability in @angular/compiler and @angular/core. Namespaced script elements (such as <svg:script>) are not stripped during template compilation and attributes of namespaced elements are not consistently sanitized, leading to Cross-Site Scripting (XSS). (CVE-2026-50557)

- A request policy bypass vulnerability in @angular/service-worker. The credentials and cache modes defined by the client are stripped when requests are reconstructed, causing credentials to be sent on requests where they should be omitted and private resources to be cached. (CVE-2026-50184)

- A Server-Side Request Forgery (SSRF) vulnerability in @angular/platform-server. A URL parser differential between the WHATWG URL parser used for allowlist validation and the Domino URL parser allows a malformed URL (such as one with a double port) to bypass the allowedHosts check and direct server-side requests to an arbitrary host. (CVE-2026-50168)

- A protection bypass vulnerability in the dynamic component instantiation (createComponent) of @angular/core. Components can be mounted onto <script> or namespaced script elements, allowing an attacker controlling the host element or selector to execute arbitrary JavaScript, leading to Cross-Site Scripting (XSS). (CVE-2026-52725)

- A request redirect policy bypass vulnerability in @angular/service-worker. The redirect mode defined by the client is stripped when requests are reconstructed, causing HTTP redirects to be followed automatically and potentially exposing credentials or session-restricted data. (CVE-2026-50169)

- A denial of service vulnerability in the formatNumber function of @angular/common, also used by DecimalPipe, PercentPipe and CurrencyPipe. The fraction digits of the digitsInfo parameter are not bounded, allowing a crafted value to trigger an unbounded loop and memory exhaustion. (CVE-2026-50171)

- An information disclosure vulnerability in the HttpTransferCache of @angular/common when SSR and hydration are enabled. Credentialed requests are cached by default in the serialized transfer state, allowing a shared cache (such as a CDN) to leak private data of a user to other users. (CVE-2026-50170)

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-50557)

Note that Nessus relies on the presence of the package as reported by the vendor.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-50557)

ID	Name	Product	Family	Type	Severity
115608	Angular < 19.2.23 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	high
115607	Angular 19.x < 19.2.23 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	high
115606	Angular 20.x < 20.3.22 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	high
115605	Angular 21.x < 21.2.15 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	high
322249	Linux Distros Unpatched Vulnerability : CVE-2026-50557	Nessus	Misc.	Local	medium
443199	SCA: security update for @angular/compiler, @angular/core (GHSA-f3m7-gqxr-g87x)	Tenable Cloud Security	SCA Checks	Local	medium
443199	SCA: security update for @angular/compiler, @angular/core (GHSA-f3m7-gqxr-g87x)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-50557

medium

Tenable Plugins

high

high

high

high

medium

medium

medium