{"id":"CVE-2026-109955","title":"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","summary":"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 pa…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-174"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T14:17:34.467","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109955","references":[{"url":"https://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/hono-4.12.4-before-4.13.11-middleware-bypass-via-servestatic-double-decoding","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"ingestedAt":"2026-10-13T14:29:01.854Z","slug":"CVE-2026-109955","body":"## Overview\n\nHono 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}