{"id":"CVE-2026-44457","aliases":["GHSA-p77w-8qqv-26rm"],"url":"https://o3.security/vulnerability/CVE-2026-44457","summary":"Hono: Cache Middleware ignores Vary: Authorization / Vary: Cookie leading to cross-user cache leakage","details":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.18, Cache Middleware does not skip caching for responses that declare per-user variance via Vary: Authorization or Vary: Cookie. As a result, a response cached for one authenticated user may be served to subsequent requests from different users. This vulnerability is fixed in 4.12.18.","published":"2026-05-13T14:58:52.931Z","modified":"2026-08-07T11:31:17.870952736Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"epss":{"score":0.00198,"percentile":0.09713,"asOf":"2026-08-09"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"hono","fixedVersion":"4.12.18"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44457.json"},{"type":"ADVISORY","url":"https://github.com/honojs/hono/security/advisories/GHSA-p77w-8qqv-26rm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44457"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:31:17.870952736Z"}}