Answer in brief
CVE-2026-88058 records a High severity (CVSS 8.6) vulnerability in Angular: SSR XSS via Unescaped Processing Instruction (<?...?>) Nodes in Fallback Raw-Content Elements. The current sources do not mark it as known exploited. The current feed maps angular/angular (generic), @angular/platform-server (npm), @angular/platform-server (npm), @angular/platform-server (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps angular/angular (generic), @angular/platform-server (npm), @angular/platform-server (npm), @angular/platform-server (npm) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:angular:angular:*:*:*:*:*:node.js:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| angular/angulargeneric | <=19.2.25 || >=20.0.0 <20.3.30 || >=21.0.0 <21.2.22 || >=22.0.0 <22.1.4 | 20.3.30, 21.2.22, 22.1.4 |
| @angular/platform-servernpm | >=22.0.0,<22.1.4 | 22.1.4 |
| @angular/platform-servernpm | >=21.0.0,<21.2.22 | 21.2.22 |
| @angular/platform-servernpm | >=20.0.0,<20.3.30 | 20.3.30 |
| @angular/platform-servernpm | <=19.2.25 | Not reported |
| @angular/platform-servernpm | >=22.0.0 <22.1.4 | 22.1.4 |
| @angular/platform-servernpm | >=21.0.0 <21.2.22 | 21.2.22 |
| @angular/platform-servernpm | >=20.0.0 <20.3.30 | 20.3.30 |
| @angular/platform-servernpm | >=0 | Not reported |
Published upstream
Sep 10, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 29, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 10, 2026
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.
Quoted source text, attributed separately from HOL analysis.