---
cve: "CVE-2026-45225"
severity: "HIGH"
cvss: 7.2
epss: "0.5%"
vendor: "heymrun"
kev: false
exploited: false
published: "2026-05-12 22:16:37"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-10-07T02:45:26+02:00"
---

# CVE-2026-45225

> 7.2 HIGH · 🧪 PoC

## Beschreibung

Heym before 0.0.21 contains a path traversal vulnerability in the file upload endpoint that allows authenticated users to write attacker-controlled files to arbitrary locations by supplying a crafted filename with traversal sequences. Attackers can exploit the unvalidated filename parameter in the upload_file() handler to bypass path restrictions and write, read, or delete files outside the intended storage directory.

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **partial**

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- fdd6fd6cca8fb10a25608011a7695fa91093e7ee (Commit)
- 835843e6d2bf7d018cbb8e50f28f0426eaa20c84 (Commit)

## Referenzen

- <https://github.com/heymrun/heym/releases/tag/v0.0.21>
- <https://github.com/heymrun/heym/pull/92>
- <https://github.com/heymrun/heym/commit/835843e6d2bf7d018cbb8e50f28f0426eaa20c84>
- <https://www.vulncheck.com/advisories/heym-path-traversal-file-upload-via-upload-file>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-45225/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_