{"items":[{"id":"NVI-00011716","kind":"vulnerability","title":"@angular/router: Denial of Service via RouterLink Query Parameter Retention in Server-Side Rendering (SSR)","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-57xq-rjx2-v5xh","CVE-2026-111751"],"plain_summary":"GitHub lists this reviewed advisory for @angular/router, @angular/router. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-0c1bccee4cf8221aa6e7f0698745a217"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-0c1bccee4cf8221aa6e7f0698745a217","url":"https://github.com/advisories/GHSA-57xq-rjx2-v5xh","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-57xq-rjx2-v5xh","publisher":"GitHub Advisory Database","observed_at":"2026-10-31T23:13:39.183Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-0c1bccee4cf8221aa6e7f0698745a217"],"technology":"@angular/router","known_exclusions":[],"conditions_summary":"A denial of service (DoS) vulnerability was identified in `@angular/router` when Server-Side Rendering (SSR) is enabled on Node.js (V8) and `RouterLink` directives are rendered with `queryParamsHandling: 'merge'` or `'preserve'`, configured either per link or globally via `defaultQueryParamsHandling`.\n\nStarting in v21.2.0 (angular/angular#66181), `RouterLink` internals were refactored to use signals, introducing a computed signal (`_urlTree`) that cached the returned `UrlTree` instance on the directive. Because each rendered link maintains an active `RouterLink` instance for the entire duration of the request lifecycle, the computed signal permanently pinned the `UrlTree` and its associated query parameter dictionary in the heap until the SSR response completed.\n\nWhen query parameter handling is set to `'merge'` or `'preserve'`, each link copies the incoming request's query parameters into its own `UrlTree`. During SSR, memory consumption scales multiplicatively:\n\n$$\\text{Heap Retention} \\approx (\\text{Number of affected links}) \\times (\\text{Size of parsed query parameter map})$$\n\nBecause parsed JavaScript objects and property dicti","public_affected_ranges":[">= 22.0.0, < 22.2.1"]},{"certainty":"source_listed","source_ids":["sr-0c1bccee4cf8221aa6e7f0698745a217"],"technology":"@angular/router","known_exclusions":[],"conditions_summary":"A denial of service (DoS) vulnerability was identified in `@angular/router` when Server-Side Rendering (SSR) is enabled on Node.js (V8) and `RouterLink` directives are rendered with `queryParamsHandling: 'merge'` or `'preserve'`, configured either per link or globally via `defaultQueryParamsHandling`.\n\nStarting in v21.2.0 (angular/angular#66181), `RouterLink` internals were refactored to use signals, introducing a computed signal (`_urlTree`) that cached the returned `UrlTree` instance on the directive. Because each rendered link maintains an active `RouterLink` instance for the entire duration of the request lifecycle, the computed signal permanently pinned the `UrlTree` and its associated query parameter dictionary in the heap until the SSR response completed.\n\nWhen query parameter handling is set to `'merge'` or `'preserve'`, each link copies the incoming request's query parameters into its own `UrlTree`. During SSR, memory consumption scales multiplicatively:\n\n$$\\text{Heap Retention} \\approx (\\text{Number of affected links}) \\times (\\text{Size of parsed query parameter map})$$\n\nBecause parsed JavaScript objects and property dicti","public_affected_ranges":[">= 21.2.0, < 21.2.25"]}],"null_published_at":"2026-11-01T01:03:56.591Z","source_updated_at":"2026-10-20T17:52:33.000Z","source_disclosed_at":"2026-10-20T17:52:32.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T23:13:39.183Z"}],"next_cursor":null,"snapshot_revision":"42594"}