Allocation of Resources Without Limits or Throttling in Angular - #VU153182
Published: October 2, 2026
Vulnerability identifier: #VU153182
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-770
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 allocation of resources without limits or throttling in the @angular/router RouterLink directive when server-side rendering RouterLink directives with merged or preserved query parameters. A remote attacker can send concurrent HTTP requests containing oversized query strings to exhaust the Node.js worker heap and terminate the SSR worker.
Exploitation requires overlapping server-side renders in the same Node.js worker and an upstream proxy or load balancer that forwards long query strings.
Affected software
Angular
Remediation
Install security update from vendor's website.
Angular - addressed in versions 21.2.25, 22.2.1