{"action":"Upgrade hono to 4.12.12 or later.","affected":[{"fixed":"4.12.12","introduced":"0"}],"component":"hono","cve_ids":["CVE-2026-39410"],"ecosystem":"npm","epss":0.00284,"exploited":false,"fixed_versions":["4.12.12"],"ghsa_id":"GHSA-r5rp-j6wh-rvv4","id":"tcs_01M5KG83J8V6TTYCKENZ2Z3K6K","modified_at":"2026-09-10T03:51:02.862741526Z","published_at":"2026-04-08T00:17:21Z","references":["https://osv.dev/vulnerability/GHSA-r5rp-j6wh-rvv4","https://github.com/honojs/hono/security/advisories/GHSA-r5rp-j6wh-rvv4","https://nvd.nist.gov/vuln/detail/CVE-2026-39410","https://github.com/honojs/hono/commit/cc067c85592415cb1880ad3c61ed923472452ec0","https://github.com/honojs/hono","https://github.com/honojs/hono/releases/tag/v4.12.12"],"severity":{"label":"medium","score":4.8},"sources":[{"source":"osv","source_id":"GHSA-r5rp-j6wh-rvv4","url":"https://osv.dev/vulnerability/GHSA-r5rp-j6wh-rvv4"}],"summary":"Hono: Non-breaking space prefix bypass in cookie name handling in getCookie()"}