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.

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	Severity
322249	Linux Distros Unpatched Vulnerability : CVE-2026-50557	Nessus	Misc.	medium
443199	SCA: security update for @angular/compiler, @angular/core (GHSA-f3m7-gqxr-g87x)	Tenable Cloud Security	SCA Checks	medium
443199	SCA: security update for @angular/compiler, @angular/core (GHSA-f3m7-gqxr-g87x)	Tenable Self-Hosted Container Security	SCA Checks	medium

Detections

Analytics

CVE-2026-50557

medium

Tenable Plugins

medium

medium

medium