CVE-2026-0809
Weak KSeF token encoding in Streamsoft Prestiż
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-261 |
| Vendor | streamsoft |
| Product | streamsoft prestiż |
| Published | Mar 12, 2026 |
| Last Updated | Mar 12, 2026 |
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Affected Versions
Streamsoft / Streamsoft Prestiż
12.2.363.17 < 20.0.380.92
References
Credits
Kamil Dąbkowski