{"items":[{"id":"NVI-00018482","kind":"vulnerability","title":"Starlette: request.form() limits silently ignored for application/x-www-form-urlencoded enable DoS","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-82w8-qh3p-5jfq","CVE-2026-54283"],"plain_summary":"GitHub lists this reviewed advisory for starlette. 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-2d50234b6ebf9830c3970ff21f3b2962"],"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":"2026-06-15T20:39:54.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2d50234b6ebf9830c3970ff21f3b2962"}],"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-2d50234b6ebf9830c3970ff21f3b2962","url":"https://github.com/advisories/GHSA-82w8-qh3p-5jfq","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-82w8-qh3p-5jfq","publisher":"GitHub Advisory Database","observed_at":"2026-11-06T07:20:20.042Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2d50234b6ebf9830c3970ff21f3b2962"],"technology":"starlette","known_exclusions":[],"conditions_summary":"### Summary\n`request.form()` accepts `max_fields` and `max_part_size` to bound resource consumption while parsing form data. These limits are enforced for `multipart/form-data`, but silently ignored for `application/x-www-form-urlencoded`. An unauthenticated attacker can therefore send a urlencoded body with an arbitrarily large number of fields or an arbitrarily large field, even when the application configured limits it believed would apply.\n\n### Details\n`request.form()` dispatches to a different parser depending on the `Content-Type`. For `multipart/form-data` the `max_files`, `max_fields`, and `max_part_size` limits are forwarded to the parser, but for `application/x-www-form-urlencoded` the parser is constructed without them. It has no `max_fields` or `max_part_size` parameter to receive them, and it appends every field with no count check and accumulates each field's name and value with no size check. The configured limits are therefore both unreachable and unenforced for url-encoded bodies.\n\nBecause the url-encoded parser does its work synchronously between stream reads, the two attack shapes have different effects:\n\n- **Field count** drives CPU and event-loop blocking. A bo","public_affected_ranges":[">= 0.4.1, < 1.3.1"]}],"null_published_at":"2026-11-07T07:07:39.841Z","source_updated_at":"2026-06-15T20:39:54.000Z","source_disclosed_at":"2026-06-15T20:39:53.000Z","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":"2026-11-06T07:20:20.042Z"}],"next_cursor":null,"snapshot_revision":"42594"}