CVE-2026-34975
HighCVSS 8.5Exploitation Probability (EPSS)
Low risk23th percentile - higher than 23% of all known CVEs
Summary
Plunk to otwartoźródłowa platforma e-mailowa oparta na AWS SES. W wersjach przed 0.8.0 odkryto podatność na wstrzykiwanie nagłówków CRLF w pliku SESService.ts, gdzie wartości dostarczane przez użytkownika były interpolowane bez sanitizacji, co pozwalało na wstrzykiwanie dowolnych nagłówków e-mailowych przez uwierzytelnionego użytkownika API.
Risk Assessment
Podatność ta umożliwia atakującym ciche przekazywanie e-maili, przekierowywanie odpowiedzi lub fałszowanie nadawcy, co może prowadzić do poważnych naruszeń bezpieczeństwa i utraty zaufania do systemu.
Recommendation
Zaleca się aktualizację do wersji 0.8.0 lub nowszej, aby skorzystać z wprowadzonej walidacji wejściowej, która odrzuca pola zawierające znaki lub .
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Original NVD description (English source)
Plunk is an open-source email platform built on top of AWS SES. Prior to 0.8.0, a CRLF header injection vulnerability was discovered in SESService.ts, where user-supplied values for from.name, subject, custom header keys/values, and attachment filenames were interpolated directly into raw MIME messages without sanitization. An authenticated API user could inject arbitrary email headers (e.g. Bcc, Reply-To) by embedding carriage return/line feed characters in these fields, enabling silent email forwarding, reply redirection, or sender spoofing. The fix adds input validation at the schema level to reject any of these fields containing \r or \n characters, consistent with the existing validation already applied to the contentId field. This vulnerability is fixed in 0.8.0.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

