CVE-2026-29045
Hono: Arbitrary file access via serveStatic vulnerability
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.
INFO
Published Date :
March 4, 2026, 11:16 p.m.
Last Modified :
March 6, 2026, 6:06 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update Hono to version 4.12.4.
- Ensure middleware correctly decodes URIs.
- Verify static resource access controls.
Public PoC/Exploit Available at Github
CVE-2026-29045 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-29045.
| URL | Resource |
|---|---|
| https://github.com/honojs/hono/commit/6a0607a929d888893f0c91d92dce2fcfdb3662a3 | Patch |
| https://github.com/honojs/hono/security/advisories/GHSA-q5qw-h33p-qvwr | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-29045 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-29045
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Dockerfile
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-29045 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-29045 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Mar. 06, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:* versions up to (excluding) 4.12.4 Added Reference Type GitHub, Inc.: https://github.com/honojs/hono/commit/6a0607a929d888893f0c91d92dce2fcfdb3662a3 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/honojs/hono/security/advisories/GHSA-q5qw-h33p-qvwr Types: Vendor Advisory -
New CVE Received by [email protected]
Mar. 04, 2026
Action Type Old Value New Value 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-177 Added Reference https://github.com/honojs/hono/commit/6a0607a929d888893f0c91d92dce2fcfdb3662a3 Added Reference https://github.com/honojs/hono/security/advisories/GHSA-q5qw-h33p-qvwr