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.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction Active

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Estonian Information System Authority (RIA) libdigidocpp unaffected
Version Status Constraints
4.1.0 affected < 4.2.1
Estonian Information System Authority (RIA) DigiDoc4 unaffected
Version Status Constraints
4.7.0 affected < 4.8.2
Estonian Information System Authority (RIA) DigiDoc unaffected
Version Status Constraints
2.7.0 affected < 2.7.2
Estonian Information System Authority (RIA) DigiDoc unaffected
Version Status Constraints
2.8.0 affected < 2.8.1

No data.

No data.

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No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

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.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/open-eid/libdigidocpp/pull/690 cve-icon cve-icon
https://www.id.ee/en/article/ria-soovitab-kasutajatel-uuendada-id-tarkvara-eng/ cve-icon
https://www.ria.ee/blogi/digidoc-rakendustes-esinenud-turvanorkus-mis-juhtus-ja-kuidas-see-parandati cve-icon
History

Mon, 10 Aug 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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

Mon, 10 Aug 2026 14:15:00 +0000

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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: ENISA

Published:

Updated: 2026-08-10T17:55:30.587Z

Reserved: 2026-07-02T15:47:36.965Z

Link: CVE-2026-59112

cve-icon Vulnrichment

Updated: 2026-08-10T17:55:24.289Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-10T18:45:17Z

Weaknesses