CVE-2026-39408

MEDIUM EPSS 40.9%
Published Apr 8, 20262mo ago · Modified Jun 17, 20262w ago
5.9 CVSS 4.0
Medium
Find Similar
Published Apr 8, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a path traversal issue in toSSG() allows files to be written outside the configured output directory during static site generation. When using dynamic route parameters via ssgParams, specially crafted values can cause generated file paths to escape the intended output directory. This vulnerability is fixed in 4.12.12.

CVSS Details

Base Score
5.9
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Local
Attack Complexity High
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
40.9% percentile
Exploit & Patch Status
Public Exploit Known
Patch Available

Weaknesses 1

CWE-22 Path Traversal Resource Mgmt

Affected Products 1

VendorProductVersionRange
honohono*≥4.0.0  –  ≤4.12.11

References 3

  • github.com https://github.com/honojs/hono/commit/b470278920fffcfd6d76002755d6db53db827679
    Patch
  • github.com https://github.com/honojs/hono/releases/tag/v4.12.12
    Release Notes
  • github.com https://github.com/honojs/hono/security/advisories/GHSA-xf4j-xp2r-rqqx
    ExploitVendor Advisory

Remediation

  • github.com https://github.com/honojs/hono/commit/b470278920fffcfd6d76002755d6db53db827679
    Patch