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Vulnerabilities

Vulnerability · CVE-2026-111751

@angular/router: Denial of Service via RouterLink Query Parameter Retention in Server-Side Rendering (SSR)

Published Oct 1, 2026 · catalog updated Oct 20, 2026 · @angular/router: Denial of Service

Last checked Nov 3, 2026. A connected source was read within the last 7 days.

Open the advisory

Exploitation likelihood is not on this record for CVE-2026-111751. A missing EPSS score is not a low risk. Compare @angular/router: Denial of Service with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (@angular/router: Denial of Service).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
High—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Not in the current FIRST EPSS dataset
Remediation
Version ranges on file
Affected products
npm @angular/router

A denial of service (DoS) vulnerability was identified in when Server-Side Rendering (SSR) is enabled on Node.js (V8) and directives are rendered with or , configured either per link or globally via . Starting in v21.2.0 ([angular/angular#66181](https://github.com/angular/angular/pull/66181)), internals were refactored to use signals, introducing a computed signal ( ) that cached the returned instance on the directive. Because each rendered link maintains an active instance for the entire duration of the request lifecycle, the computed signal permanently pinned the and its associated query parameter dictionary in the heap until the SSR response completed. When query parameter handling is set to or , each link copies the incoming request's query parameters into its own . During SSR, memory consumption scales multiplicatively: $$\text{Heap Retention} \approx (\text{Number of affected links}) \times (\text{Size of parsed query parameter map})$$ Because parsed JavaScript objects and property dictionaries require substantially more heap space than the raw query string—particularly when property names trigger dense array allocations under V8 property-storage heuristics—an attacker can supply oversized query strings to amplify heap consumption by orders of magnitude per in-flight request. ### Impact Successful exploitation allows an unauthenticated remote attacker to exhaust the Node.js old-space heap with modest concurrent request volume, terminating the SSR worker with an unrecoverable JavaScript heap out of memory fatal crash. * **Numeric Names Not Required:** Numeric query parameter names trigger larger V8 property-storage allocations (~558 KB per parsed dictionary in tests vs. ~197 KB for non-numeric equivalents), lowering the concurrency threshold needed for a crash. However, non-numeric query parameters also produce significant heap amplification and can exhaust worker memory with proportionally higher concurrency. * **Client-side SPAs Unaffected:** Pure client-side

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • npm @angular/router21.2.0 → 21.2.25
  • npm @angular/router22.0.0 → 22.2.1
  • npm @angular/router>= 21.2.0, < 21.2.25
  • npm @angular/router>= 22.0.0, < 22.2.1

How to fix CVE-2026-111751

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for CVE-2026-111751. A missing EPSS score is not a low risk. Compare @angular/router: Denial of Service with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 21.2.0 → 21.2.25, 22.0.0 → 22.2.1, >= 21.2.0, < 21.2.25, >= 22.0.0, < 22.2.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-400: Uncontrolled Resource Consumption; CWE-770: Allocation of Resources Without Limits or Throttling. EPSS is absent from the current FIRST dataset. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Angular security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 20, 2026 · GitHub Advisory Database

    Detected

    A denial of service (DoS) vulnerability was identified in when Server-Side Rendering (SSR) is enabled on Node.js (V8) and directives are rendered with or , configured either per link or globally via . Starting in v21.2.0 ([angular/angular#66181](https://github.com/angular/angular/pull/66181)), internals were refactored to use signals, introducing a computed signal ( ) that cached the returned inst

  2. Oct 20, 2026 · GitHub Advisory Database

    Fix available

    @angular/router fixed in 22.2.1; @angular/router fixed in 21.2.25

  3. Oct 20, 2026 · GitHub Advisory Database

    Fix available

    @angular/router fixed in 22.2.1

  4. Oct 20, 2026 · GitHub Advisory Database

    Fix available

    @angular/router fixed in 21.2.25

  5. Oct 20, 2026 · GitHub Advisory Database

    Updated

    A denial of service (DoS) vulnerability was identified in when Server-Side Rendering (SSR) is enabled on Node.js (V8) and directives are rendered with or , configured either per link or globally via . Starting in v21.2.0 ([angular/angular#66181](https://github.com/angular/angular/pull/66181)), internals were refactored to use signals, introducing a computed signal ( ) that cached the returned inst

Sources

  • CVE.orgVulnerability recordCVE-2026-111751

    CVE.org record is not available yet.

    cve.org
  • GitHub Advisory DatabasePackage advisoryGHSA-57xq-rjx2-v5xh

    GitHub Advisory Database record mirrored by OSV.

    github.com
  • Maintainer security tabsVendor advisoryGHSA-57xq-rjx2-v5xh

    A denial of service (DoS) vulnerability was identified in when Server-Side Rendering (SSR) is enabled on Node.js (V8) and directives are rendered with or , configured either per link or globally via . Starting in v21.2.0 ([angular/angular#66181](https://github.com/angular/angular/pull/66181)), internals were refactored to use signals, introducing a computed signal ( ) that cached the returned inst

    github.com
  • OpenSSF OSV / OSV ScannerPackage advisoryGHSA-57xq-rjx2-v5xh

    @angular/router: Denial of Service via RouterLink Query Parameter Retention in Server-Side Rendering (SSR)

    osv.dev

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Maintainer security tabsNov 2, 2026
  • CVE.orgOct 21, 2026
  • GitHub Advisory DatabaseOct 20, 2026
  • OpenSSF OSV / OSV ScannerOct 20, 2026