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    CVE-2026-103902

    Improper verification of cryptographic signature vulnerability in DigiDoc libdigidocpp, DigiDoc DigiDoc4, DigiDoc DigiDoc Android, and DigiDoc DigiDoc iOS. The vulnerability allows an attacker to create forged digital signatures that are displayed a valid by affected DigiDoc software.This issue affects libdigidocpp: from 4.0.0 before 4.5.0; DigiDoc4: from 4.6.0 before 4.11.0; DigiDoc Android: from 2.7.0 before 3.1.0; DigiDoc iOS: from 2.7.0 before 3.1.0.

    Published:Oct 12, 2026
    Last Modified:Oct 15, 2026
    EPS:Oct 12, 2026
    EPSS Score:0.00147
    CVSS Score:7.5

    Affected Products

    Vendor
    Digidoc
    Product
    Digidoc4
    Vendor
    Digidoc
    Product
    Digidoc Android
    Vendor
    Digidoc
    Product
    Digidoc Ios
    Vendor
    Digidoc
    Product
    Libdigidocpp

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-463 Padding Oracle Crypto Attack
    CAPEC-475 Signature Spoofing by Improper Validation

    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