# CVE-2026-111751: Angular: Denial of Service via RouterLink Query Parameter Retention in Server-Side Rendering (SSR)

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

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.

## Remediation

- fix: @angular/router (npm): OSV reports a fixed version 22.2.1. Check the advisory for supported release branches. (source: OSV GHSA-57xq-rjx2-v5xh) — https://github.com/advisories/GHSA-57xq-rjx2-v5xh
- fix: @angular/router (npm): OSV reports a fixed version 21.2.25. Check the advisory for supported release branches. (source: OSV GHSA-57xq-rjx2-v5xh) — https://github.com/advisories/GHSA-57xq-rjx2-v5xh

## Affected products and versions

- angular / angular: >= 21.2.0, < 21.2.25 (affected); >= 22.0.0, < 22.2.1 (affected). Source: CNA: GitHub_M
-  / @angular/router (@angular/router): ≥ 22.0.0; < 22.2.1 (affected, semver); OSV events: introduced 22.0.0; fixed 22.2.1. Source: OSV GHSA-57xq-rjx2-v5xh
-  / @angular/router (@angular/router): ≥ 21.2.0; < 21.2.25 (affected, semver); OSV events: introduced 21.2.0; fixed 21.2.25. Source: OSV GHSA-57xq-rjx2-v5xh

## Severity and prioritization

- CVSS 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; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-400, CWE-770

## 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-v5xh (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/angular/angular/issues/70908 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/pull/70953 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/commit/14793bfe4b44a36ed4b7e49a60458ec711c2b41a (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/commit/a131f77d92808ad5c2f3fa4dc6fde36825f12c5a (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/releases/tag/v21.2.25 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/angular/angular/releases/tag/v22.2.1 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/advisories/GHSA-57xq-rjx2-v5xh (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-57xq-rjx2-v5xh (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-111751; retrieved 2026-11-03; source updated 2026-11-03

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-57xq-rjx2-v5xh; retrieved 2026-11-03; source updated 2026-10-20

Revision: 3c13b558375b44bcbf0d84cee374d1627904c3d4acc7bf168935b809209f16fd

Canonical: https://y2.dev/cve/CVE-2026-111751

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.