CVE-2026-88058: Angular

Medium severity, CVSS 6.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.30, 21.2.22, and 22.1.4, Angular server-side rendering (SSR) in @angular/platform-server serializes ProcessingInstruction DOM nodes inside fallback raw-content elements without escaping matching ancestor closing tags. ProcessingInstruction data escaped greater-than characters but left less-than characters untouched and did not inspect fallback ancestors, so data such as a matching closing tag prematurely terminates noscript, iframe, noembed, or noframes containers. The vulnerable nodes cannot be authored through standard Angular templates; reachability requires application or library code using inject(DOCUMENT).createProcessingInstruction with attacker-controlled data or Renderer2 DOM insertion inside a fallback container. In HTML5 RAWTEXT parsing, the premature close causes subsequent sibling elements to be interpreted as live HTML and enables arbitrary JavaScript execution in a victim's browser. This issue is fixed in versions 20.3.30, 21.2.22, and 22.1.4.

Affected products

• Angular Angular: from 19.0.0, up to and including 19.2.25; from 20.0.0, before 20.3.30 (fixed in 20.3.30); from 21.0.0, before 21.2.22 (fixed in 21.2.22); from 22.0.0, before 22.1.4 (fixed in 22.1.4)

Published 2026-09-10. Last modified 2026-09-29.