Reference page — cumulative record through Saturday, October 3, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-88058

CVE-2026-88058HIGH

Angular: SSR XSS via Unescaped Processing Instruction (<?...?>) Nodes in Fallback Raw-Content Elements

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   P   H   H   N    8.6   .0028   18.7     —

AFFECTED
  Product  Versions      Fixed
  angular  <= 19.2.25 –  —

TIMELINE
  Sep 9   Reserved by GitHub_M
  Sep 10  Published (CNA: GitHub_M)
  Sep 29  EXPLOIT PUBLISHED — CVE-2026-88058 (angular). Public exploit reference added.

CWE-79, CWE-116 · CNA: GitHub_M · CVSS v4.0 · 9 references · NVD status: Analyzed

Description

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 9, 2026	Reserved	Reserved by GitHub_M
September 10, 2026	Published	Published (CNA: GitHub_M)
September 29, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-88058 (angular). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
angular	angular	—	<= 19.2.25	—

Weaknesses

CWE-79 · CWE-116

References (9)

https://github.com/angular/angular/commit/73d8bbd27cb46495426d4132975a1355b47ad915 [Patch]
https://github.com/angular/angular/commit/89b20568dfaee1ec8e0b3bcf1872acdddd2f4fef [Patch]
https://github.com/angular/angular/commit/ba3bc47b20b3d12f5eb141ec9c651373ae4d15e8 [Patch]
https://github.com/angular/angular/issues/70146 [Issue Tracking, Patch]
https://github.com/angular/angular/releases/tag/v20.3.30 [Release Notes]
https://github.com/angular/angular/releases/tag/v21.2.22 [Release Notes]
https://github.com/angular/angular/releases/tag/v22.1.4 [Release Notes]
https://github.com/angular/angular/security/advisories/GHSA-j3r3-mxqp-r2p4 [Exploit, Third Party Advisory]
https://github.com/angular/domino/commit/04f987dc08ff3736b427f50941adf1722458528f [Patch]

Authoritative record: CVE-2026-88058 at cve.org

Vendors: angular

Weaknesses: CWE-79 · CWE-116

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-88058 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Saturday, October 3, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.