---
cve: "CVE-2026-40256"
severity: "MEDIUM"
cvss: 5.0
epss: "0.3%"
vendor: "WeblateOrg"
kev: false
exploited: false
published: "2026-04-15 19:16:37"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-25T16:27:20+02:00"
---

# CVE-2026-40256

> 5.0 MEDIUM · 🧪 PoC

## Beschreibung

Weblate is a web based localization tool. In versions prior to 5.17, repository-boundary validation relies on string prefix checks on resolved absolute paths. In multiple code paths, the check uses startswith against the repository root path. This is not path-segment aware and can be bypassed when the external path shares the same string prefix as the repository path (for example, repo and repo_outside). This issue has been fixed in version 5.17.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 1dd6ea9403d1f266d03e4537a91d6e57c5f6310f (Commit)
- e30dbcb33ae78e754ecef192d54f996b89cb4e15 (Commit)

## Referenzen

- <https://github.com/WeblateOrg/weblate/security/advisories/GHSA-ffgh-3jrf-8wvh>
- <https://github.com/WeblateOrg/weblate/commit/e30dbcb33ae78e754ecef192d54f996b89cb4e15>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-40256) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_