Fiche vulnérabilité
CVE-2026-33645 : faille élevée shaneisrael fireshare (CVSS 8.1)
Description
Fireshare facilitates self-hosted media and link sharing. In version 1.5.1, an authenticated path traversal vulnerability in Fireshare’s chunked upload endpoint allows an attacker to write arbitrary files outside the intended upload directory. The `checkSum` multipart field is used directly in filesystem path construction without sanitization or containment checks. This enables unauthorized file writes to attacker-chosen paths writable by the Fireshare process (e.g., container `/tmp`), violating integrity and potentially enabling follow-on attacks depending on deployment. Version 1.5.2 fixes the issue.
En bref
- Sévérité
- Élevée (CVSS 8.1)
- Vecteur CVSS
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- Exploitation active
- Non signalée par la CISA
- Publication
- 26 mars 2026
- Dernière mise à jour
- 17 juin 2026
Produits concernés
- shaneisrael fireshare