Description
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, when using serveStatic together with route-based middleware protections (e.g. app.use('/admin/*', ...)), inconsistent URL decoding allowed protected static resources to be accessed without authorization. The router used decodeURI, while serveStatic used decodeURIComponent. This mismatch allowed paths containing encoded slashes (%2F) to bypass middleware protections while still resolving to the intended filesystem path. This issue has been patched in version 4.12.4.
Published: 2026-03-04
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

No analysis available yet.

Remediation

No remediation available yet.

Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-q5qw-h33p-qvwr Hono vulnerable to arbitrary file access via serveStatic vulnerability
History

Fri, 06 Mar 2026 18:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*

Thu, 05 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 05 Mar 2026 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Hono
Hono hono
Vendors & Products Hono
Hono hono

Wed, 04 Mar 2026 22:30:00 +0000

Type Values Removed Values Added
Description Hono is a Web application framework that provides support for any JavaScript runtime. Prior to version 4.12.4, when using serveStatic together with route-based middleware protections (e.g. app.use('/admin/*', ...)), inconsistent URL decoding allowed protected static resources to be accessed without authorization. The router used decodeURI, while serveStatic used decodeURIComponent. This mismatch allowed paths containing encoded slashes (%2F) to bypass middleware protections while still resolving to the intended filesystem path. This issue has been patched in version 4.12.4.
Title Hono: Arbitrary file access via serveStatic vulnerability
Weaknesses CWE-177
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-05T15:42:05.041Z

Reserved: 2026-03-03T17:50:11.243Z

Link: CVE-2026-29045

cve-icon Vulnrichment

Updated: 2026-03-05T15:39:30.478Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-04T23:16:10.247

Modified: 2026-03-06T18:06:45.650

Link: CVE-2026-29045

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-05T09:05:36Z

Weaknesses