---
cve: "CVE-2026-72834"
severity: "MEDIUM"
cvss: 5.3
epss: "23%"
vendor: "filebrowser"
kev: false
exploited: false
published: "2026-08-14 12:16:46"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-03T00:31:54+02:00"
---

# CVE-2026-72834

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

filebrowser before 2.63.19 contains a permission bypass in the /api/resources endpoint. The checksum (?checksum=) branch of resourceGetHandler reads the entire file to compute a digest and returns it without performing a Perm.Download check (unlike the sibling raw, preview, and subtitle paths). As a result, an authenticated user provisioned with Perm.Download=false can obtain a content-hash oracle for any same-scope file (md5/sha1/sha256/sha512), enabling confirmation of known/guessed content, change detection, and offline brute-force of low-entropy files. This is an incomplete fix of CVE-2026-35606; it bypasses only the Download permission and does not defeat scope/path authorization.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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)

- 328f629181888760f3c8b3ff9f3b5bec50f4e54f (Commit)
- b7dc392838f11d188f0bc0f2a1a99fad3f7dca03 (Commit)

## Referenzen

- <https://github.com/filebrowser/filebrowser/security/advisories/GHSA-7whw-q6gh-xr59>
- <https://github.com/filebrowser/filebrowser/commit/b7dc392838f11d188f0bc0f2a1a99fad3f7dca03>
- <https://www.vulncheck.com/advisories/filebrowser-before-permission-bypass-via-checksum>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-72834) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_