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6.3

Streamsoft Prestiż: KSeF Token Can Be Guessable

CVE-2026-0809
Summary

Streamsoft Prestiż software's custom token encoding can be bypassed, allowing potential unauthorized access to sensitive information. This affects users who rely on this software for secure token management. Update to version 20.0.380.92 to resolve the issue.

Original title
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 en...
Original 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.
nvd CVSS4.0 6.3
Vulnerability type
CWE-261
Published: 12 Mar 2026 · Updated: 13 Mar 2026 · First seen: 12 Mar 2026