# CVE-2026-111752: Angular: Denial of Service via Unmatched Empty-Path Outlet Route Matching in Server-Side Rendering (SSR)

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.33, 21.2.25, and 22.2.1, @angular/router in Node.js server-side rendering fails to require auxiliary outlet URL segments to match routes configured for their outlet names. Crafted requests containing multiple unconfigured empty-path outlet groups can repeatedly evaluate the route configuration, construct duplicate ActivatedRouteSnapshot trees, execute canMatch guards and resolvers, and copy route parameters and queryParams for each outlet. An unauthenticated remote attacker can exhaust the Node.js heap or CPU and terminate an SSR worker when SSR is enabled, a route level contains an empty-path route or named outlet, upstream infrastructure forwards the request target, and the worker has a constrained heap. The allocation is transient rather than a persistent leak, and client-side SPAs and build-time prerendering are not affected. This issue is fixed in versions 20.3.33, 21.2.25, and 22.2.1.

## Remediation

- fix: @angular/router (npm): OSV reports a fixed version 22.2.1. Check the advisory for supported release branches. (source: OSV GHSA-62vg-58rm-qff7) — https://github.com/advisories/GHSA-62vg-58rm-qff7
- fix: @angular/router (npm): OSV reports a fixed version 21.2.25. Check the advisory for supported release branches. (source: OSV GHSA-62vg-58rm-qff7) — https://github.com/advisories/GHSA-62vg-58rm-qff7
- fix: @angular/router (npm): OSV reports a fixed version 20.3.33. Check the advisory for supported release branches. (source: OSV GHSA-62vg-58rm-qff7) — https://github.com/advisories/GHSA-62vg-58rm-qff7

## Affected products and versions

- angular / angular: <= 19.2.25 (affected); >= 20.0.0, < 20.3.33 (affected); >= 21.0.0, < 21.2.25 (affected); >= 22.0.0, < 22.2.1 (affected). Source: CNA: GitHub_M
-  / @angular/router (@angular/router): ≥ 22.0.0; < 22.2.1 (affected, semver); OSV events: introduced 22.0.0; fixed 22.2.1. Source: OSV GHSA-62vg-58rm-qff7
-  / @angular/router (@angular/router): ≥ 21.0.0; < 21.2.25 (affected, semver); OSV events: introduced 21.0.0; fixed 21.2.25. Source: OSV GHSA-62vg-58rm-qff7
-  / @angular/router (@angular/router): ≥ 20.0.0; < 20.3.33 (affected, semver); OSV events: introduced 20.0.0; fixed 20.3.33. Source: OSV GHSA-62vg-58rm-qff7
-  / @angular/router (@angular/router): ≥ 0; ≤ 19.2.25 (affected, semver); OSV events: introduced 0; last affected 19.2.25. Source: OSV GHSA-62vg-58rm-qff7

## Severity and prioritization

- CVSS 4.0: 8.2 (high); CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-400, CWE-405

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/angular/angular/security/advisories/GHSA-62vg-58rm-qff7 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/angular/angular/issues/70932 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/issues/70997 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/pull/71055 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/commit/a83f8119acd466b524ae0113096ed188358d6d6c (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/commit/b0d2ba0f54e21cb57ea5a0ca0d8e6065f28e23a0 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/commit/e9bf52aa03a3b9b302c33ffbc967ef0e1de5fb79 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/releases/tag/v20.3.33 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/releases/tag/v21.2.25 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/releases/tag/v22.2.1 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/advisories/GHSA-62vg-58rm-qff7 (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-62vg-58rm-qff7 (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-111752; retrieved 2026-11-03; source updated 2026-11-03

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-62vg-58rm-qff7; retrieved 2026-11-03; source updated 2026-10-20

Revision: 48bfef16f36ac328f548f57c1ba4fc8c9f6df0ee83c4c8488ecdeb8ae04bc5ee

Canonical: https://y2.dev/cve/CVE-2026-111752

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