CVE-2026-59112 json
Signature validation vulnerability affecting DigiDoc applications
published 2026-08-10 2 mo ago modified 2026-09-01 2 mo ago also EUVD-2026-55632
- cvss
- 4.4
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.1%
- EPSS 0.1% chance of exploitation in 30 days, percentile 1%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Estonian Information System Authority (RIA) libdigidocpp 4.2.1
- Estonian Information System Authority (RIA) DigiDoc4 4.8.2
- Estonian Information System Authority (RIA) DigiDoc 2.7.2, 2.8.1
- github.com/open-eid/libdigidocpp#690 pull request
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 2 mo ago
Exploit prediction
0.12% chance of exploitation in the next 30 days, higher than 1% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/open-eid/libdigidocpp/pull/690 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 4.4 | 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 |
| CNA | 4.0 | 4.4 | 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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- Estonian Information System Authority (RIA) libdigidocpp
- Estonian Information System Authority (RIA) DigiDoc4
- Estonian Information System Authority (RIA) DigiDoc
Classification
References
-
github.com
/open-eid/libdigidocpp/pull/690
patch, exploit
-
id.ee
/en/article/ria-soovitab-kasutajatel-uuendada-id-tarkvara-eng/
vendor-advisory
-
ria.ee
/blogi/digidoc-rakendustes-esinenud-turvanorkus-mis-juhtus-ja-kuidas-see-parandati
government-resource
Sources
- CVE List CVE-2026-59112
- NVD CVE-2026-59112
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