{"items":[{"id":"NVI-00018532","kind":"vulnerability","title":"React Router's vendored turbo-stream v2 allows arbitrary constructor invocation via TYPE_ERROR deserialization leading to Unauth RCE","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-49rj-9fvp-4h2h","CVE-2026-42211"],"plain_summary":"GitHub lists this reviewed advisory for react-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-37f2976df4eff9418453331670c057bd"],"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":[{"kind":"CVSS","as_of":"2026-06-03T21:03:33.000Z","value":"8.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-37f2976df4eff9418453331670c057bd"}],"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-37f2976df4eff9418453331670c057bd","url":"https://github.com/advisories/GHSA-49rj-9fvp-4h2h","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-49rj-9fvp-4h2h","publisher":"GitHub Advisory Database","observed_at":"2026-11-07T00:53:06.181Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-37f2976df4eff9418453331670c057bd"],"technology":"react-router","known_exclusions":[],"conditions_summary":"When using React Router v7 in Framework Mode, there exists a combination of steps that could potentially allow unauthorized RCE through external requests.  This first requires the application code to have an existing prototype pollution vulnerability.  This can be leveraged into a 2-step attack in which the second step can trigger unauthorized RCE on the remote server.\n\n> [!NOTE]\n> This does not impact your React Router application if you are using Declarative Mode (``) or Data Mode (`createBrowserRouter`/``).","public_affected_ranges":[">= 7.0.0, <= 7.14.1"]}],"null_published_at":"2026-11-07T07:07:39.848Z","source_updated_at":"2026-06-03T21:03:33.000Z","source_disclosed_at":"2026-06-03T21:03:32.000Z","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":"2026-11-07T00:53:06.181Z"}],"next_cursor":null,"snapshot_revision":"42594"}