CVE-2026-32728
HighSummary
Parse Server, otwarte źródło backendu, przed wersjami 9.6.0-alpha.15 i 8.6.41, pozwalał atakującym na obejście filtru rozszerzeń plików poprzez dodanie parametru MIME do nagłówka `Content-Type`. To prowadziło do możliwości przechowywania aktywnej zawartości pod domeną aplikacji, co zwiększa ryzyko ataków XSS.
Risk Assessment
Organizacja narażona jest na ataki XSS, które mogą prowadzić do kompromitacji tokenów sesyjnych, danych uwierzytelniających użytkowników oraz innych wrażliwych informacji przechowywanych w lokalnej pamięci przeglądarki.
Recommendation
Zaleca się aktualizację do wersji 9.6.0-alpha.15 lub 8.6.41, które usuwają parametry MIME z nagłówka `Content-Type` przed walidacją rozszerzeń plików oraz rozszerzają domyślną listę blokowanych rozszerzeń o dodatkowe rozszerzenia oparte na XML.
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Original NVD description (English source)
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.15 and 8.6.41, an attacker who is allowed to upload files can bypass the file extension filter by appending a MIME parameter (e.g. `;charset=utf-8`) to the `Content-Type` header. This causes the extension validation to fail matching against the blocklist, allowing active content to be stored and served under the application's domain. In addition, certain XML-based file extensions that can render scripts in web browsers are not included in the default blocklist. This can lead to stored XSS attacks, compromising session tokens, user credentials, or other sensitive data accessible via the browser's local storage. The fix in versions 9.6.0-alpha.15 and 8.6.41 strips MIME parameters from the `Content-Type` header before validating the file extension against the blocklist. The default blocklist has also been extended to include additional XML-based extensions (`xsd`, `
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

