Hono 4.12.4 before 4.13.11 Middleware Bypass via serveStatic Double Decoding
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.
CVE-2026-109955
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-109955
hono
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "honojs",
"product": "hono",
"versions": [
{
"status": "affected",
"version": "4.12.4",
"lessThan": "4.13.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "4.13.11",
"versionType": "semver"
}
],
"packageURL": "pkg:npm/hono",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-109955
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #17372 · Revision 1
- Added to Heist Feed
- Publisher date