# CVE-2026-101895: Angular platform-server denial of service via malformed DOCTYPE

Source: https://junglewise.ai/threats/cve-2026-101895-angular-ssr-denial-of-service-dos-via-infinite-loop-on-malformed  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-14. Updated: 2026-09-28  
License: CC BY 4.0 with a link back

CVE-2026-101895 · Severity: high · CVSS 4 · Published 2026-10-14

Angular's server-side rendering module uses the Domino HTML parser to process user-supplied HTML. When given a malformed DOCTYPE declaration, the parser enters an infinite loop that consumes 100% CPU, freezing the Node.js server and blocking all incoming requests. An unauthenticated attacker can trigger this by sending a simple incomplete DOCTYPE string.

Technologies: [Angular @Angular/Platform-Server](https://junglewise.ai/threats/technologies/angular-platform-server-1), [@angular/platform-server (npm)](https://junglewise.ai/threats/technologies/angular-platform-server). Vendors: [Angular](https://junglewise.ai/threats/vendors/angular), [npm](https://junglewise.ai/threats/vendors/npm).

## Quick answers

**Is CVE-2026-101895 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-101895 being exploited in the wild.

**How severe is CVE-2026-101895?** High severity, with a CVSS score of 4, published 14 October 2026.

**Which products and versions are affected?** @angular/platform-server (npm) SEMVER:introduced=22.0.0,fixed=22.1.6.

**Is there a fix for CVE-2026-101895?** Yes. @angular/platform-server (npm): upgrade to 22.1.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-101895 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-101895?** Check whether you run Angular @Angular/Platform-Server or @angular/platform-server (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- @angular/platform-server (npm): upgrade to 22.1.6 or later

  ```sh
  npm install @angular/platform-server@22.1.6
  ```


## Technical details

The vulnerability exists in Domino's `after_doctype_name_state` tokenizer handler, which fails to advance the character pointer when EOF is encountered, causing the synchronous parser loop to repeatedly re-invoke the same state with the EOF marker. This infinite loop starves the Node.js event loop in a single-threaded runtime. The flaw is reachable when untrusted input is bound to `[innerHTML]` in Angular SSR templates.

## Affected products

- Angular @angular/platform-server

## Identifiers

- CVE-2026-101895
- GHSA-f67j-2jqw-jpq7

## Timeline

- 2026-09-28: disclosed

## Related threats

- [Angular platform-server open redirect via protocol-relative URLs in SSR](https://junglewise.ai/threats/cve-2026-111754-angular-platform-server-open-redirect-via-protocol-relative-urls)
- [Angular platform-server SSR XSS via unescaped template in fallback elements](https://junglewise.ai/threats/cve-2026-88060-angular-platform-server-ssr-xss-via-unescaped-template-in)
- [Angular platform-server XSS via ProcessingInstruction DOM serialization](https://junglewise.ai/threats/cve-2026-88058-angular-platform-server-xss-via-processinginstruction-dom)
- [Angular platform-server SSRF via URL resolution discrepancy](https://junglewise.ai/threats/cve-2026-88056-angular-platform-server-ssrf-via-url-resolution-discrepancy)
- [Angular SSR XSS in fallback raw-content elements](https://junglewise.ai/threats/cve-2026-69149-angular-ssr-xss-in-fallback-raw-content-elements)