NuytsTech Security

CVE-2026-0809

by ·

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.

More information : https://cert.pl/posts/2026/03/CVE-2026-0809

Tags: