CVE-2026-111751
Angular: Denial of Service via RouterLink Query Parameter Retention in Server-Side Rendering (SSR)
Angular is a development platform for building mobile and desktop web applications using TypeScript/JavaScript and other languages. From 21.2.0 until 21.2.25 and 22.2.1, RouterLink directives rendered during Node.js server-side rendering retain computed UrlTree instances for the lifetime of each request. When queryParamsHandling is set to merge or preserve, either per link or through defaultQueryParamsHandling, every rendered link can retain a copy of attacker-controlled query parameters in its UrlTree. When upstream proxies or load balancers forward oversized query strings without rejecting them at the edge, multiple affected links and overlapping renders can amplify heap use until the Node.js old-space heap is exhausted and the SSR worker terminates. Numeric query-parameter names increase allocation pressure but are not required, memory is released after rendering completes, and pure client-side SPAs are not affected. This issue is fixed in versions 21.2.25 and 22.2.1.
Fixes and workarounds
Fix
@angular/router (npm): OSV reports a fixed version 22.2.1. Check the advisory for supported release branches.
Source: OSV GHSA-57xq-rjx2-v5xhFix
@angular/router (npm): OSV reports a fixed version 21.2.25. Check the advisory for supported release branches.
Source: OSV GHSA-57xq-rjx2-v5xhAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| angular angular |
>= 21.2.0, < 21.2.25 (affected) >= 22.0.0, < 22.2.1 (affected) |
CNA: GitHub_M |
@angular/router@angular/router
npm |
≥ 22.0.0; < 22.2.1 (affected, semver); OSV events: introduced 22.0.0; fixed 22.2.1Source events (semver)Other versions: unaffected |
OSV GHSA-57xq-rjx2-v5xh |
@angular/router@angular/router
npm |
≥ 21.2.0; < 21.2.25 (affected, semver); OSV events: introduced 21.2.0; fixed 21.2.25Source events (semver)Other versions: unaffected |
OSV GHSA-57xq-rjx2-v5xh |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.2 high |
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 |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/angular/angular/security/advisories/GHSA-57xq-rjx2-v5xhCNA: GitHub_M · x_refsource_CONFIRM
- https://github.com/angular/angular/issues/70908CNA: GitHub_M · x_refsource_MISC
- https://github.com/angular/angular/pull/70953CNA: GitHub_M · x_refsource_MISC
- https://github.com/angular/angular/commit/14793bfe4b44a36ed4b7e49a60458ec711c2b41aCNA: GitHub_M · x_refsource_MISC
- https://github.com/angular/angular/commit/a131f77d92808ad5c2f3fa4dc6fde36825f12c5aCNA: GitHub_M · x_refsource_MISC
- https://github.com/angular/angular/releases/tag/v21.2.25CNA: GitHub_M · x_refsource_MISC
- https://github.com/angular/angular/releases/tag/v22.2.1CNA: GitHub_M · x_refsource_MISC
- https://github.com/advisories/GHSA-57xq-rjx2-v5xhOSV / GitHub Security Advisories · advisory
- https://osv.dev/vulnerability/GHSA-57xq-rjx2-v5xhOSV / GitHub Security Advisories · osv
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