{"id":"CVE-2026-54290","aliases":["EUVD-2026-38329","GHSA-88fw-hqm2-52qc","ROOT-APP-NPM-CVE-2026-54290"],"status":"published","title":"Hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard","description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, with 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. This vulnerability is fixed in 4.12.25.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00328,"percentile":0.26186,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-942"],"published":"2026-06-16T14:15:39Z","modified":"2026-10-28T02:30:33Z","fixes":[{"ecosystem":"npm","package":"hono","fixed_in":["4.12.25"],"sources":["ghsa","osv"]},{"ecosystem":"Root:npm","package":"hono","fixed_in":["4.12.14-aikido.5","4.12.12-aikido.1","4.12.14-aikido.6","4.12.14-aikido.7","4.12.14-aikido.8","4.12.12-aikido.2","4.12.25-aikido.1"],"sources":["osv"]},{"ecosystem":"Root:npm","package":"@rootio/hono","fixed_in":["4.12.14-root.io.5","4.12.14-root.io.6","4.12.12-root.io.1","4.12.14-root.io.7","4.12.14-root.io.8","4.12.12-root.io.2","4.12.25-root.io.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"hono","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.25"}]}]},{"source":"osv","ecosystem":"npm","package":"hono","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.12.25"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"hono","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.14-aikido.5"},{"fixed":"4.12.12-aikido.1"},{"fixed":"4.12.14-aikido.6"},{"fixed":"4.12.14-aikido.7"},{"fixed":"4.12.14-aikido.8"},{"fixed":"4.12.12-aikido.2"},{"fixed":"4.12.25-aikido.1"}]}]},{"source":"osv","ecosystem":"Root:npm","package":"@rootio/hono","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.14-root.io.5"},{"fixed":"4.12.14-root.io.6"},{"fixed":"4.12.12-root.io.1"},{"fixed":"4.12.14-root.io.7"},{"fixed":"4.12.14-root.io.8"},{"fixed":"4.12.12-root.io.2"},{"fixed":"4.12.25-root.io.1"}]}]}],"products":[{"vendor":"honojs","product":"hono"}],"references":[{"url":"https://github.com/honojs/hono/security/advisories/GHSA-88fw-hqm2-52qc","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54290","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-88fw-hqm2-52qc"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54290.json","tags":["advisory"]},{"url":"https://github.com/honojs/hono","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-54290","title":"Hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard","description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, with 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. This vulnerability is fixed in 4.12.25.","status":"published","published":"2026-06-22T17:15:35.689Z","modified":"2026-06-22T17:26:12.791Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-942"],"updated_at":"2026-11-02T13:37:58.613221Z"}],"euvd":[{"id":"EUVD-2026-38329","description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, with 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. This vulnerability is fixed in 4.12.25.","status":"published","published":"2026-06-22T17:15:35Z","modified":"2026-06-22T17:26:12Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","level":"high"}],"updated_at":"2026-11-02T18:20:34.238696Z"}],"ghsa":[{"id":"GHSA-88fw-hqm2-52qc","title":"hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard","description":"### 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`.","status":"published","published":"2026-06-16T14:15:39Z","modified":"2026-07-21T15:27:04Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","level":"high"}],"cwes":["CWE-942"],"updated_at":"2026-11-02T14:40:49.410128Z"}],"nvd":[{"id":"CVE-2026-54290","description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, with 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. This vulnerability is fixed in 4.12.25.","status":"published","published":"2026-06-22T18:16:47.62Z","modified":"2026-10-25T23:10:00.167Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-942"],"updated_at":"2026-11-02T14:12:24.912854Z"}],"osv":[{"id":"CVE-2026-54290","title":"Hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard","description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.25, with 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. This vulnerability is fixed in 4.12.25.","status":"published","published":"2026-06-22T17:15:35.689Z","modified":"2026-10-28T02:30:33.165970434Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","level":"high"}],"cwes":["CWE-942"],"updated_at":"2026-11-02T15:45:10.818486Z"},{"id":"GHSA-88fw-hqm2-52qc","title":"hono: CORS Middleware reflects any Origin with credentials when `origin` defaults to the wildcard","description":"### 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`.","status":"published","published":"2026-06-16T14:15:39Z","modified":"2026-09-10T03:50:48.939674527Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N","level":"high"}],"cwes":["CWE-942"],"updated_at":"2026-11-02T15:46:42.077781Z"},{"id":"ROOT-APP-NPM-CVE-2026-54290","title":"CVE-2026-54290 in hono - Patched by Root","description":"Root has patched CVE-2026-54290 in the hono package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-09-25T06:19:53Z","modified":"2026-09-25T07:15:22.419759636Z","updated_at":"2026-11-02T15:53:27.649662Z"}]}}