---
cve: "CVE-2026-93955"
severity: "MEDIUM"
cvss: 5.3
epss: "4.8%"
vendor: "grimmory-tools"
kev: false
exploited: false
published: "2026-09-19 23:17:09"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-21T06:29:25+02:00"
---

# CVE-2026-93955

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

A vulnerability was detected in grimmory-tools grimmory up to 3.3.3/3.4.1. Affected by this vulnerability is the function streamFileToResponse of the file backend/src/main/java/org/booklore/controller/KoboController.java of the component Download Endpoint. Performing a manipulation of the argument bookId results in authorization bypass. The attack may be initiated remotely. The exploit is now public and may be used. Issue #2431 is closed as completed, but its only comment states that the issue “has already been reported elsewhere.” No fixing commit or pull request is identified there.

## 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/E:P
```

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

## Referenzen

- <https://vuldb.com/vuln/407914>
- <https://vuldb.com/vuln/407914/cti>
- <https://vuldb.com/cve/CVE-2026-93955>
- <https://vuldb.com/submit/943921>
- <https://github.com/grimmory-tools/grimmory/issues/2431>
- <https://github.com/grimmory-tools/grimmory/issues/2431#issuecomment-5384402858>
- <https://github.com/grimmory-tools/grimmory/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-93955) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_