{"action":"Upgrade hono to 4.12.21 or later.","affected":[{"fixed":"4.12.21","introduced":"0"}],"component":"hono","cve_ids":["CVE-2026-47676"],"ecosystem":"npm","epss":0.0026,"exploited":false,"fixed_versions":["4.12.21"],"ghsa_id":"GHSA-2gcr-mfcq-wcc3","id":"tcs_01M5KET1Q20Q78PTEDTGPT4EYR","modified_at":"2026-09-10T03:51:07.554753223Z","published_at":"2026-06-04T18:01:00Z","references":["https://osv.dev/vulnerability/GHSA-2gcr-mfcq-wcc3","https://github.com/honojs/hono/security/advisories/GHSA-2gcr-mfcq-wcc3","https://nvd.nist.gov/vuln/detail/CVE-2026-47676","https://github.com/honojs/hono/commit/6cbb025ff87fca1a3d00d0ccca0eaf3a6385c3f1","https://github.com/honojs/hono","https://github.com/honojs/hono/releases/tag/v4.12.21"],"severity":{"label":"medium","score":5.3},"sources":[{"source":"osv","source_id":"GHSA-2gcr-mfcq-wcc3","url":"https://osv.dev/vulnerability/GHSA-2gcr-mfcq-wcc3"}],"summary":"Hono: app.mount() strips mount prefix using undecoded path, causing incorrect routing for percent-encoded paths"}