CVE-2026-111752

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

publishedCWE-400CWE-405

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.

Technical severity8.2 highCVSS 4.0 · CNA: GitHub_M

Published2026-11-03Source updated 2026-11-03

Collected2026-11-032 attributed sources

Fixes and workarounds

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

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

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

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
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)	CNA: GitHub_M
@angular/router `@angular/router` npm	≥ 22.0.0; < 22.2.1 (affected, semver); OSV events: introduced 22.0.0; fixed 22.2.1 Source events (semver) `[ { "introduced": "22.0.0" }, { "fixed": "22.2.1" } ]` Other versions: unaffected	OSV GHSA-62vg-58rm-qff7
@angular/router `@angular/router` npm	≥ 21.0.0; < 21.2.25 (affected, semver); OSV events: introduced 21.0.0; fixed 21.2.25 Source events (semver) `[ { "introduced": "21.0.0" }, { "fixed": "21.2.25" } ]` Other versions: unaffected	OSV GHSA-62vg-58rm-qff7
@angular/router `@angular/router` npm	≥ 20.0.0; < 20.3.33 (affected, semver); OSV events: introduced 20.0.0; fixed 20.3.33 Source events (semver) `[ { "introduced": "20.0.0" }, { "fixed": "20.3.33" } ]` Other versions: unaffected	OSV GHSA-62vg-58rm-qff7
@angular/router `@angular/router` npm	≥ 0; ≤ 19.2.25 (affected, semver); OSV events: introduced 0; last affected 19.2.25 Source events (semver) `[ { "introduced": "0" }, { "last_affected": "19.2.25" } ]` Other versions: unaffected	OSV GHSA-62vg-58rm-qff7

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
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`	CNA: GitHub_M

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-qff7CNA: GitHub_M · x_refsource_CONFIRM
https://github.com/angular/angular/issues/70932CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/issues/70997CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/pull/71055CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/commit/a83f8119acd466b524ae0113096ed188358d6d6cCNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/commit/b0d2ba0f54e21cb57ea5a0ca0d8e6065f28e23a0CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/commit/e9bf52aa03a3b9b302c33ffbc967ef0e1de5fb79CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/releases/tag/v20.3.33CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/releases/tag/v21.2.25CNA: GitHub_M · x_refsource_MISC
https://github.com/angular/angular/releases/tag/v22.2.1CNA: GitHub_M · x_refsource_MISC
https://github.com/advisories/GHSA-62vg-58rm-qff7OSV / GitHub Security Advisories · advisory
https://osv.dev/vulnerability/GHSA-62vg-58rm-qff7OSV / GitHub Security Advisories · osv

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