CVE-2026-39408 | honojs hono up to 4.12.11 toSSG path traversal

VDB-356250 · CVE-2026-39408 · GCVE-0-2026-39408 HONOJS HONO UP TO 4.12.11 TOSSG PATH TRAVERSAL HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 3.8 $0-$5k 0.87+ Summaryinfo A vulnerability was found in honojs hono up to 4.12.11. It has been declared as critical. This issue affects the function toSSG. The manipulation results in path traversal. This vulnerability is known as CVE-2026-39408. Attacking locally is a requirement. No exploit is available. It is recommended to upgrade the affected component. Detailsinfo A vulnerability, which was classified as problematic, was found in honojs hono up to 4.12.11. Affected is the function toSSG. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on integrity, and availability. CVE summarizes: 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. The advisory is available at github.com. This vulnerability is traded as CVE-2026-39408 since 04/07/2026. The exploitability is told to be difficult. Local access is required to approach this attack. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1006 by the MITRE ATT&CK project. Upgrading to version 4.12.12 eliminates this vulnerability. Productinfo Vendor honojs Name hono Version 4.12.0 4.12.1 4.12.2 4.12.3 4.12.4 4.12.5 4.12.6 4.12.7 4.12.8 4.12.9 4.12.10 4.12.11 Website Product: https://github.com/honojs/hono/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CNA CVSS-B Score: 🔒 CNA CVSS-BT Score: 🔒 CNA Vector: 🔒 CVSSv3info VulDB Meta Base Score: 4.0 VulDB Meta Temp Score: 3.8 VulDB Base Score: 4.0 VulDB Temp Score: 3.8 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Path traversal CWE: CWE-22 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: hono 4.12.12 Timelineinfo 04/07/2026 CVE reserved 04/08/2026 +1 days Advisory disclosed 04/08/2026 +0 days VulDB entry created 04/08/2026 +0 days VulDB entry last update Sourcesinfo Product: github.com Advisory: github.com Status: Confirmed CVE: CVE-2026-39408 (🔒) GCVE (CVE): GCVE-0-2026-39408 GCVE (VulDB): GCVE-100-356250 Entryinfo Created: 04/08/2026 17:20 Changes: 04/08/2026 17:20 (68) Complete: 🔍 Cache ID: 99:7E1:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸