CVE-2026-101896: @angular router · Uncontrolled Resource Consumption
Affects @angular routerSource CVE Database V5
Not known to be exploited · CVSS 8.2 High · fixed in 20.3.32 : patch @angular router soon.
Data as of 10/25/2026, 09:18:28 UTC
- Exploitation
Not in CISA KEV, no exploitation reported
- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers can reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-10-20.
- Patch
- Available – fixed in 20.3.32
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NWhat to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| angularangular | Affected
| Fixed in
|
| @angularrouter | Affected
| Fixed in
|
npm@angular/routerpkg:npm/@angular/routerOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. Prior to 20.3.32, 21.2.24, and 22.2.0, the @angular/router URL parser stores numeric matrix parameter names and numeric outlet names as properties on initially empty JavaScript objects during Node.js server-side rendering. V8 can interpret these URL-derived keys as array indices and allocate dense backing stores sized to high numeric values, so repeated small path segments cause disproportionate per-segment heap consumption. An unauthenticated attacker can send overlapping requests containing repeated numeric matrix parameters when SSR is enabled, the router directly parses the request URL, and upstream proxies allow semicolons and multiple path segments, eventually exhausting the Node.js old-space heap and terminating the SSR worker. Pure client-side Angular applications are not affected. This issue is fixed in versions 20.3.32, 21.2.24, and 22.2.0.
Weaknesses
- CWE-400Uncontrolled Resource Consumption (opens in a new tab)
Class weaknessLikelihood of exploit: High
The product does not properly control the allocation and maintenance of a limited resource.
MITRE discourages mapping vulnerabilities to this broad entry; the root cause is usually a more specific weakness.
- CWE-770Allocation of Resources Without Limits or Throttling (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #25
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.
References
- github.com/angular/angular/security/advisories/GHSA-ff3f-86qr-9cv3 (opens in a new tab)
- github.com/angular/angular/issues/70716 (opens in a new tab)
- github.com/angular/angular/pull/70717 (opens in a new tab)
- github.com/angular/angular/commit/03872a80bcf1c89b2b04cdd3f444b2ee954da583 (opens in a new tab)
- github.com/angular/angular/commit/5af61216eab8bf4a6697a1d79bda3d857c06f89d (opens in a new tab)
- github.com/angular/angular/commit/ddfe21072ba32ca4cd9d7d3c6b7df66af81d58c4 (opens in a new tab)
- github.com/angular/angular/releases/tag/v20.3.32 (opens in a new tab)
- github.com/angular/angular/releases/tag/v21.2.24 (opens in a new tab)
- github.com/angular/angular/releases/tag/v22.2.0 (opens in a new tab)