CVE-2026-109955

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Source
https://cve.org/CVERecord?id=CVE-2026-109955
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109955.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-109955
Aliases
  • GHSA-5r4p-p66f-jhc7
Published
2026-10-13T13:27:19Z
Modified
2026-10-15T02:47:23Z
Severity
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
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.

Database specific 
{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-174"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109955.json"
}
References

Affected packages

Git / github.com/honojs/hono

Affected ranges

Type
GIT
Repo
https://github.com/honojs/hono
Events
Introduced
19d20d23a2921e26c3bbfdb5549fce98b4a39b28
Fixed
37ce06904e732d4bc11c9075adf362c76049a594
Database specific
Show details 
{
    "extracted_events":  [
        {
            "introduced":  "4.12.4"
        },
        {
            "fixed":  "4.13.11"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

@hono/deno@1.*
@hono/deno@1.0.1
@hono/deno@1.0.2
@hono/netlify@1.*
@hono/netlify@1.0.1
v4.*
v4.12.10
v4.12.11
v4.12.12
v4.12.13
v4.12.14
v4.12.15
v4.12.16
v4.12.17
v4.12.18
v4.12.19
v4.12.20
v4.12.21
v4.12.22
v4.12.23
v4.12.24
v4.12.25
v4.12.26
v4.12.27
v4.12.28
v4.12.29
v4.12.30
v4.12.31
v4.12.32
v4.12.33
v4.12.34
v4.12.4
v4.12.5
v4.12.6
v4.12.7
v4.12.8
v4.12.9
v4.13.0
v4.13.1
v4.13.10
v4.13.2
v4.13.3
v4.13.4
v4.13.5
v4.13.6
v4.13.7
v4.13.8
v4.13.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109955.json"