{"items":[{"id":"NVI-00016100","kind":"vulnerability","title":"hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-88fw-hqm2-52qc","CVE-2026-54290"],"plain_summary":"GitHub lists this reviewed advisory for hono. 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-216cadfcaf7e2eb65b7207438583be65"],"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":"2026-07-21T15:27:04.000Z","value":"7.1 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-216cadfcaf7e2eb65b7207438583be65"}],"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-216cadfcaf7e2eb65b7207438583be65","url":"https://github.com/advisories/GHSA-88fw-hqm2-52qc","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-88fw-hqm2-52qc","publisher":"GitHub Advisory Database","observed_at":"2026-11-03T22:34:49.300Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-216cadfcaf7e2eb65b7207438583be65"],"technology":"hono","known_exclusions":[],"conditions_summary":"### Summary\n\nWith `credentials: true` and no explicit `origin` (the default wildcard), the CORS Middleware reflects the request's `Origin` and sends `Access-Control-Allow-Credentials: true`. Any site can then make credentialed cross-origin requests and read the responses, exposing cookie-authenticated endpoints to arbitrary origins.\n\n### Details\n\nThe spec forbids `Access-Control-Allow-Origin: *` with credentials and browsers reject it, so this configuration used to fail closed. In affected versions the middleware reflects the request `Origin` instead, so it now succeeds for every origin, including `null`. The preflight also echoes the requested headers back, approving non-simple credentialed requests too.\n\nThis issue arises when an application enables `credentials: true` and leaves `origin` unset or set to the wildcard.\n\n### Impact\n\nAny third-party page a logged-in user visits can read the application's cookie-authenticated endpoints and perform credentialed state-changing requests. This affects applications that enable credentialed CORS without restricting `origin`.","public_affected_ranges":["< 4.12.25"]}],"null_published_at":"2026-11-04T10:04:27.891Z","source_updated_at":"2026-07-21T15:27:04.000Z","source_disclosed_at":"2026-06-16T14:15:39.000Z","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":"2026-11-03T22:34:49.300Z"}],"next_cursor":null,"snapshot_revision":"42594"}