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CVE PROGRAM SOURCE RECORD5.9 Medium

CVE-2026-39408

Hono has a path traversal in toSSG() allows writing files outside the output directory

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

honojs hono

  • < 4.12.12affected

References