CVE-2026-0809

Published: Mar 12, 2026

Modified: Mar 12, 2026

PUBLISHED

Description

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.

Vendor	Product	Versions
Streamsoft	Streamsoft Prestiż	affected `12.2.363.17 - < 20.0.380.92`

Weaknesses (CWE)

CWE-261

References

https://www.streamsoft.pl/streamsoft-prestiz/

product

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

third-party-advisory

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CVE-2026-0809

Description

Affected Products

Weaknesses (CWE)

References