CVE-2026-88058
mediumAngular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages.
Vendor / product: Angular — angular
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://github.com/angular/angular/commit/73d8bbd27cb46495426d4132975a1355b47ad915 security-advisories@github.com
- https://github.com/angular/angular/commit/89b20568dfaee1ec8e0b3bcf1872acdddd2f4fef security-advisories@github.com
- https://github.com/angular/angular/commit/ba3bc47b20b3d12f5eb141ec9c651373ae4d15e8 security-advisories@github.com
- https://github.com/angular/angular/issues/70146 security-advisories@github.com
- https://github.com/angular/angular/releases/tag/v20.3.30 security-advisories@github.com
- https://github.com/angular/angular/releases/tag/v21.2.22 security-advisories@github.com
- https://github.com/angular/angular/releases/tag/v22.1.4 security-advisories@github.com
- https://github.com/angular/angular/security/advisories/GHSA-j3r3-mxqp-r2p4 security-advisories@github.com
- https://github.com/angular/domino/commit/04f987dc08ff3736b427f50941adf1722458528f security-advisories@github.com
- https://github.com/angular/angular/issues/70146 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://github.com/angular/angular/security/advisories/GHSA-j3r3-mxqp-r2p4 134c704f-9b21-4f2e-91b3-4a467353bcc0