---
cve: "CVE-2026-73509"
severity: "HIGH"
cvss: 7.6
epss: "37%"
vendor: "OpenListTeam"
kev: false
exploited: false
published: "2026-08-13 15:20:17"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-19T16:33:38+02:00"
---

# CVE-2026-73509

> 7.6 HIGH · 🧪 PoC

## Beschreibung

OpenList a file list program that supports multiple storage. Prior to 4.2.4, the authenticated /api/fs/batch_rename handler in server/handles/fsbatch.go authorizes only the source directory produced by user.JoinPath(req.SrcDir) and validates renameObject.NewName with checkRelativePath, but does not validate attacker-controlled renameObject.SrcName, supplied as src_name, before concatenating it with the authorized path and passing the result to fs.Rename. A user with rename permission can use traversal segments in src_name to make path normalization select a file outside the authorized directory and configured base path, resulting in cross-user file integrity loss, limited availability impact, and file-existence disclosure through success or error responses. This issue is fixed in version 4.2.4.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Gering | warn |

## Patch verfügbar (OSV)

- 651da18da4c647d96648d4bb64462baac1c37e04 (Commit)
- 84ecda35aae2bd0020474086e6ddfd3aa2340679 (Commit)

## Referenzen

- <https://github.com/OpenListTeam/OpenList/security/advisories/GHSA-95cv-r8x4-vh75>
- <https://github.com/OpenListTeam/OpenList/commit/651da18da4c647d96648d4bb64462baac1c37e04>
- <https://github.com/OpenListTeam/OpenList/releases/tag/v4.2.4>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-73509) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_