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    CVE-2026-0809

    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.

    Published:Mar 12, 2026
    Last Modified:Mar 20, 2026
    EPS:Mar 12, 2026
    EPSS Score:0.00054
    CVSS Score:6.3

    Affected Products

    Vendor
    Streamsoft
    Product
    Streamsoft Prestiż

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-261 Weak Encoding for Password

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-55 Rainbow Table Password Cracking

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High