CVE-2026-33645
HighSummary
W wersji 1.5.1 Fireshare, aplikacji do udostępniania mediów i linków, występuje podatność na przejście ścieżki w punkcie końcowym przesyłania chunków. Umożliwia to atakującemu zapis dowolnych plików poza zamierzonym katalogiem przesyłania.
Risk Assessment
Podatność ta narusza integralność systemu, co może prowadzić do dalszych ataków w zależności od sposobu wdrożenia. Atakujący może zapisywać pliki w lokalizacjach, które są dostępne dla procesu Fireshare.
Recommendation
Zaleca się aktualizację do wersji 1.5.2, która naprawia tę podatność. Należy również przeprowadzić audyt zabezpieczeń, aby ocenić potencjalne skutki tej luki.
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Original NVD description (English source)
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.

