CVE-2026-0809Weak KSeF token encoding in Streamsoft Prestiż

Beschreibung

Use of a custom token encoding algorithm in Streamsoft Prestiż software allows the value of the KSeF (Krajowy System e-Faktur) token to be guessed after analyzing how tokens with know values are encoded. This issue was fixed in version 20.0.380.92.

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Referenzen und Patches

• https://www.streamsoft.pl/streamsoft-prestiz/ product
• https://cert.pl/posts/2026/03/CVE-2026-0809 third-party-advisory