Resource exhaustion in Angular - #VU151872
Published: September 23, 2026
Vulnerability identifier: #VU151872
CSH Severity: Medium
CVSS v4: 8.2 [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]
CVE-ID: N/A
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in @angular/router when parsing request URLs with numeric matrix parameter names. A remote attacker can send concurrent crafted requests containing repeated numeric matrix parameters to cause a denial of service.
Exploitation requires a Node.js/V8 server-side rendering deployment in which upstream proxies forward semicolon-containing, multi-segment URLs.
Affected software
Angular
Remediation
Install security update from vendor's website.
Angular - addressed in versions 20.3.32, 21.2.24, 22.2.0