CVE-2026-40262
HighCVSS 8.7Exploitation Probability (EPSS)
Low risk24th percentile - higher than 24% of all known CVEs
Summary
Note Mark to aplikacja do robienia notatek typu open-source. W wersjach 0.19.1 i wcześniejszych, obsługa dostarczania zasobów nieprawidłowo identyfikuje typy treści dla plików tekstowych, takich jak HTML, SVG czy XHTML, co pozwala na ich wykonanie w kontekście aplikacji.
Risk Assessment
Zagrożenie polega na możliwości wykonania złośliwego kodu JavaScript przez uwierzytelnionego użytkownika, co może prowadzić do kradzieży sesji i nieautoryzowanego dostępu do działań API ofiary.
Recommendation
Zaleca się aktualizację aplikacji Note Mark do wersji 0.19.2, aby usunąć tę podatność oraz wprowadzenie dodatkowych zabezpieczeń w zakresie identyfikacji typów treści.
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Original NVD description (English source)
Note Mark is an open-source note-taking application. In versions 0.19.1 and prior, the asset delivery handler serves uploaded files inline and relies on magic-byte detection for content type, which does not identify text-based formats such as HTML, SVG, or XHTML. These files are served with an empty Content-Type, no X-Content-Type-Options: nosniff header, and inline disposition, allowing browsers to sniff and render active content. An authenticated user can upload an HTML or SVG file containing JavaScript as a note asset, and when a victim navigates to the asset URL, the script executes under the application's origin with access to the victim's authenticated session and API actions. This issue has been fixed in version 0.19.2.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

