TI-2026-23190 Aliases CVE-2026-29045 GHSA-q5qw-h33p-qvwr

Hono: Arbitrary file access via serveStatic vulnerability

MEDIUM 49CWE-177Published 2026-03-04 · Updated 2026-03-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00587 48th percentileScored 2026-11-07

Fix Fixed hono (honojs): 4.12.4hono (npm): 4.12.4

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
honojs	hono	before 4.12.4	4.12.4	Patch available	CNA
—	hono (npm)	before 4.12.4	4.12.4	Patch available	GHSA-q5qw-h33p-qvwr

hono Vendorhonojs Affected before 4.12.4 Fixed in 4.12.4 Patch available CNA
hono (npm) Vendor— Affected before 4.12.4 Fixed in 4.12.4 Patch available GHSA-q5qw-h33p-qvwr

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:hono:hono::::::node.js::*	before 4.12.4	Vulnerable	honojs

cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:* Versions before 4.12.4 Vulnerable ·honojs

Remediation

Fix · CNA hono (honojs) Fixed in 4.12.4
Fix · GHSA-q5qw-h33p-qvwr hono (npm) Fixed in 4.12.4 Advisory →

Timeline

2026-10-02 Threatist record created from CVE-2026-29045
2026-10-03 Alias added: GHSA-q5qw-h33p-qvwr

References

Patch 1

https://github.com/honojs/hono/commit/6a0607a929d888893f0c91d92dce2fcfdb3662a3

Advisory 2

Other 1

https://github.com/honojs/hono

TI-2024-21741 Hono vulnerable to Restricted Directory Traversal in serveStatic with deno CVSS 3.1MEDIUM 5.3
TI-2024-32610 Hono vulnerable to bypass of CSRF Middleware by a request without Content-Type header. CVSS 3.1MEDIUM 5.9
TI-2024-29381 Hono CSRF middleware can be bypassed using crafted Content-Type header CVSS 3.1MEDIUM 5.0
TI-2026-22076 Hono is Vulnerable to Authentication Bypass by IP Spoofing in AWS Lambda ALB conninfo CVSS 3.1HIGH 8.2
TI-2026-18334 JWT algorithm confusion in Hono JWK Auth Middleware when JWK lacks "alg" (untrusted header.alg fallback) CVSS 3.1HIGH 8.2
TI-2026-18333 JWT Algorithm Confusion via Unsafe Default (HS256) in Hono JWT Middleware Allows Token Forgery and Auth Bypass CVSS 3.1HIGH 8.2

See all 33 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences