CVE-2026-59112

Signature validation vulnerability affecting DigiDoc applications

State: Published
Severity: 4.4 Medium
Published: Aug 10, 2026
Updated: Aug 10, 2026
Reserved: Jul 2, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	4.4 Medium	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	ENISA

Weaknesses

CWE-347 Improper verification of cryptographic signature
CWE-754 Improper Check for Unusual or Exceptional Conditions

Affected Products

Product	Versions
libdigidocppEstonian Information System Authority (RIA)	4.1.0 to before 4.2.1Affected
DigiDoc4Estonian Information System Authority (RIA)	4.7.0 to before 4.8.2Affected
DigiDocEstonian Information System Authority (RIA)	2.7.0 to before 2.7.2Affected
DigiDocEstonian Information System Authority (RIA)	2.8.0 to before 2.8.1Affected

References

https://github.com/open-eid/libdigidocpp/pull/690patch
https://www.id.ee/en/article/ria-soovitab-kasutajatel-uuendada-id-tarkvara-eng/vendor-advisory
https://www.ria.ee/blogi/digidoc-rakendustes-esinenud-turvanorkus-mis-juhtus-ja-kuidas-see-parandatigovernment-resource

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