GHSA-ff3f-86qr-9cv3: @angular/router (CVE-2026-101896)

Package	Ecosystem	Affected	Fixed in
@angular/router	npm	>=22.0.0, <22.2.0 \|\| >=21.0.0, <21.2.24 \|\| >=20.0.0, <20.3.32 \|\| <=19.2.25	22.2.0, 21.2.24, 20.3.32

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Angular's @angular/router package is vulnerable to denial of service when Server-Side Rendering is enabled on Node.js (V8), in versions up to 19.2.25, from 20.0.0 before 20.3.32, from 21.0.0 before 21.2.24, and from 22.0.0 before 22.2.0. An unauthenticated remote attacker can send concurrent requests with crafted URLs containing numeric matrix parameters, which exhausts the Node.js heap and crashes the SSR worker. Upgrade @angular/router to 20.3.32, 21.2.24, or 22.2.0; the source also lists workarounds such as stripping semicolons at the reverse proxy.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
8.2	High	4.0	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)

CISA KEV Not listed.
EPSS 0.0091, the 60th percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

23 Sept 2026, 19:02 UTC Published by the maintainers as a GitHub repository advisory
31 Oct 2026, 13:34 UTC First seen by agentprime
31 Oct 2026, 13:34 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.