CVE-2026-39408

HIGH

7.5

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.

CVE Details

CVSS v3.1 Score7.5

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published4/8/2026

Last Modified4/10/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-22

References

https://github.com/honojs/hono/commit/b470278920fffcfd6d76002755d6db53db827679(security-advisories@github.com)

https://github.com/honojs/hono/releases/tag/v4.12.12(security-advisories@github.com)

https://github.com/honojs/hono/security/advisories/GHSA-xf4j-xp2r-rqqx(security-advisories@github.com)

IOC Correlations

No correlations recorded

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