CVE-2026-50557 (Medium) detected in core-12.2.5.tgz, compiler-12.2.5.tgz

[mend-for-github-com]

CVE-2026-50557 - Medium Severity Vulnerability

Vulnerable Libraries - core-12.2.5.tgz, compiler-12.2.5.tgz

core-12.2.5.tgz

Angular - the core framework

Library home page: https://registry.npmjs.org/@⁠angular/core/-/core-12.2.5.tgz

Path to dependency file: /package.json

Path to vulnerable library: /package.json

Dependency Hierarchy:

• ❌ core-12.2.5.tgz (Vulnerable Library)

compiler-12.2.5.tgz

Angular - the compiler library

Library home page: https://registry.npmjs.org/@⁠angular/compiler/-/compiler-12.2.5.tgz

Path to dependency file: /package.json

Path to vulnerable library: /package.json

Dependency Hierarchy:

• ❌ compiler-12.2.5.tgz (Vulnerable Library)

Found in HEAD commit: 36a9c5d28529109984de6fcc3d0a157d561dac4a

Found in base branch: master

Vulnerability Details

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" (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.
Mend Note: The description of this vulnerability differs from MITRE.

Publish Date: 2026-06-22

URL: CVE-2026-50557

CVSS 3 Score Details (5.4)

Base Score Metrics:

• Exploitability Metrics:
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: None
  • User Interaction: Required
  • Scope: Unchanged
• Impact Metrics:
  • Confidentiality Impact: Low
  • Integrity Impact: Low
  • Availability Impact: None

For more information on CVSS3 Scores, click here.

Suggested Fix

Type: Upgrade version

Origin: GHSA-f3m7-gqxr-g87x

Release Date: 2026-06-15

Fix Resolution: https://github.com/angular/angular.git - v21.2.15,https://github.com/angular/angular.git - v20.3.22,https://github.com/angular/angular.git - v19.2.22

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