Description
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.
Published: 2026-10-13
Score: 6.9 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Tue, 13 Oct 2026 13:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Hono 4.12.4 before 4.13.11 Middleware Bypass via serveStatic Double Decoding
First Time appeared Hono
Hono hono
Weaknesses CWE-174
CPEs cpe:2.3:a:hono:hono:*:*:*:*:*:*:*:*
Vendors & Products Hono
Hono hono
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}

cvssV4_0

{'score': 6.9, 'vector': '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'}

Subscriptions

Hono Hono
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-13T13:51:43.403Z

Reserved: 2026-10-13T11:25:25.214Z

Link: CVE-2026-109955

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-13T14:17:34.340

Modified: 2026-10-13T14:17:34.467

Link: CVE-2026-109955

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses
  • CWE-174

    Double Decoding of the Same Data