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CVE-2026-101896VulnerabilityPublished 10/14/2026Updated 10/20/2026

CVE-2026-101896: @angular router · Uncontrolled Resource Consumption

Affects @angular routerSource CVE Database V5

0

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

CVSS 4.0 base score
8.2High
How severe the flaw is on the 0–10 CVSS scale.
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:N

What to do

Affected software

ProductAffectedFixed in
angularangularAffected
  • <=19.2.25
  • >=20.0.0 <20.3.32
  • >=21.0.0 <21.2.24
  • >=22.0.0 <22.2.0
Fixed in
  • 20.3.32
  • 21.2.24
  • 22.2.0
@angularrouterAffected
  • <=19.2.25
  • >=20.0.0 <20.3.32
  • >=21.0.0 <21.2.24
  • >=22.0.0 <22.2.0
Fixed in
  • 20.3.32
  • 21.2.24
  • 22.2.0
npm@angular/routerpkg:npm/@angular/routerOther threatsAffected
  • <=19.2.25
  • >=20.0.0 <20.3.32
  • >=21.0.0 <21.2.24
  • >=22.0.0 <22.2.0
Fixed in
  • 20.3.32
  • 21.2.24
  • 22.2.0

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

References

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