CVE-2026-59112

Signature validation vulnerability affecting DigiDoc applications

Published Aug 10, 2026 CVSS 4.0 · 4.4 Medium EPSS < 1% KEV · Not listed
Description
Improper verification of cryptographic signature and Improper Check for Unusual or Exceptional Conditions vulnerability in Estonian Information System Authority (RIA) libdigidocpp, DigiDoc4, DigiDoc on Android, and DigiDoc on iOS. This issue affects libdigidocpp: from 4.1.0 before 4.2.1; DigiDoc4: from 4.7.0 before 4.8.2; DigiDoc on Android: from 2.7.0 before 2.7.2; DigiDoc on iOS: from 2.8.0 before 2.8.1.

Remediation

Vendor Solution

Systems integrating libdigidocpp should update to version 4.2.1 or later.  Users of DigiDoc applications should update to fixed versions provided by the vendor:  DigiDoc4 - 4.8.2 or later, RIA DigiDoc Android - 2.7.2 or later, and RIA DigiDoc iOS - 2.8.1 or later.  Signatures that were validated with the vulnerable software versions should be revalidated.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Estonian Information System Authority (ria)
Estonian Information System Authority (ria) digidoc
Estonian Information System Authority (ria) digidoc4
Estonian Information System Authority (ria) libdigidocpp
Vendors & Products Estonian Information System Authority (ria)
Estonian Information System Authority (ria) digidoc
Estonian Information System Authority (ria) digidoc4
Estonian Information System Authority (ria) libdigidocpp
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Improper verification of cryptographic signature and Improper Check for Unusual or Exceptional Conditions vulnerability in Estonian Information System Authority (RIA) libdigidocpp, DigiDoc4, DigiDoc on Android, and DigiDoc on iOS. This issue affects libdigidocpp: from 4.1.0 before 4.2.1; DigiDoc4: from 4.7.0 before 4.8.2; DigiDoc on Android: from 2.7.0 before 2.7.2; DigiDoc on iOS: from 2.8.0 before 2.8.1.
Title Signature validation vulnerability affecting DigiDoc applications
Weaknesses CWE-347
CWE-754
References
Metrics cvssV4_0

{'score': 4.4, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ENISA
Published
Updated
Aug 10, 2026, 5:55 PM
Reserved
Jul 2, 2026, 3:47 PM
Status
Deferred
Published
Aug 10, 2026, 2:17 PM
Modified
Sep 1, 2026, 9:07 PM