Read the docs
TI-2024-29381 Aliases CVE-2024-43787GHSA-rpfr-3m35-5vx5

Hono CSRF middleware can be bypassed using crafted Content-Type header

Priority MEDIUM 56CWE-352Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-352.

Summary

Hono is a Web application framework that provides support for any JavaScript runtime. Hono CSRF middleware can be bypassed using crafted Content-Type header. MIME types are case insensitive, but isRequestedByFormElementRe only matches lower-case. As a result, attacker can bypass csrf middleware using upper-case form-like MIME type. This vulnerability is fixed in 4.5.8.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00244 15th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed hono (honojs): 4.5.8hono (npm): 4.5.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
honojshonobefore 4.5.84.5.8Patch availableCNA
—hono (npm)before 4.5.84.5.8Patch availableGHSA-rpfr-3m35-5vx5
  • hono Vendorhonojs Affected before 4.5.8 Fixed in 4.5.8 Patch available CNA
  • hono (npm) Vendor— Affected before 4.5.8 Fixed in 4.5.8 Patch available GHSA-rpfr-3m35-5vx5

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*before 4.5.8Vulnerablehonojs
  • cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:* Versions before 4.5.8 Vulnerable ·honojs

Remediation

  • Fix · CNA hono (honojs) Fixed in 4.5.8
  • Fix · GHSA-rpfr-3m35-5vx5 hono (npm) Fixed in 4.5.8 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-43787
  2. 2026-10-03 Alias added: GHSA-rpfr-3m35-5vx5

References

Exploit 1

Patch 1

Advisory 1

Other 2

  • 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-2026-23190 Hono: Arbitrary file access via serveStatic vulnerability CVSS 3.1CRITICAL 9.8
  • 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