---
cve: "CVE-2026-39408"
severity: "MEDIUM"
cvss: 5.9
epss: "53%"
vendor: "honojs"
kev: false
exploited: false
published: "2026-04-08 15:16:14"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-16T14:27:17+02:00"
---

# CVE-2026-39408

> 5.9 MEDIUM · 🧪 PoC

## Beschreibung

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-Vektor

```
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
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Hoch | good |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- b470278920fffcfd6d76002755d6db53db827679 (Commit)
- c37ba26da9709ad03b803d1972773ed864b7e60d (Commit)

## Referenzen

- <https://github.com/honojs/hono/security/advisories/GHSA-xf4j-xp2r-rqqx>
- <https://github.com/honojs/hono/commit/b470278920fffcfd6d76002755d6db53db827679>
- <https://github.com/honojs/hono/releases/tag/v4.12.12>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-39408) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_