{"schema":"threatline.record/2","record":{"id":"CVE-2026-109955","aliases":["CVE-2026-111757","GHSA-5r4p-p66f-jhc7"],"summary":"Hono 4.12.4 before 4.13.11 Middleware Bypass via serveStatic Double Decoding","details":"Hono from 4.12.4 before 4.13.11 contains a middleware bypass vulnerability in serveStatic that allows unauthenticated attackers to skip prefix middleware by exploiting double path decoding. Attackers can send malformed percent-encoded paths that the router matches in encoded form, reaching static files without authentication checks running.","categories":["Libraries & packages"],"product":"hono","vendor":"honojs","ecosystem":"npm","affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109955","source_modified_at":"2026-10-13T13:51:43.403Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"hono","vendor":"honojs","versions":[{"version":"4.12.4","status":"affected","versionType":"semver","lessThan":"4.13.11"},{"version":"4.13.11","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-5r4p-p66f-jhc7","source_modified_at":"2026-10-20T14:45:03.780823695Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"hono","purl":"pkg:npm/hono"},"ranges":[{"events":[{"introduced":"4.12.4"},{"fixed":"4.13.11"}],"type":"SEMVER"}],"versions":[]}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109955","source_modified_at":"2026-10-13T13:51:43.403Z","fetched_at":"2026-10-23T18:48:36.087640Z","package":{"name":"hono","ecosystem":null},"version":"4.13.11","basis":"first unaffected version stated in the CVE record"},{"source":"OSV","source_url":"https://osv.dev/vulnerability/GHSA-5r4p-p66f-jhc7","source_modified_at":"2026-10-20T14:45:03.780823695Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"ecosystem":"npm","name":"hono","purl":"pkg:npm/hono"},"version":"4.13.11"}],"cvss":6.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00314,"percentile":0.23144,"score_date":"2026-10-23"},"published_at":"2026-10-13T13:27:19.610Z","modified_at":"2026-10-20T14:45:03.780823695Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-109955","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-13T13:51:43.403Z"},{"source":"OSV","url":"https://osv.dev/vulnerability/GHSA-5r4p-p66f-jhc7","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-20T14:45:03.780823695Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-109955","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","OSV","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7","tags":["vendor-advisory"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/hono-4.12.4-before-4.13.11-middleware-bypass-via-servestatic-double-decoding","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-13T13:51:31.306804Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"ecosystem","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-20T14:45:03.780823695Z","content_hash":"91f97d06f57b55291bc72ff2abfe4659f443c35ba5154e625920ffdd6f864c5a"}}