CVE-2026-59112
Signature validation vulnerability affecting DigiDoc applications
- Published
- Updated
- Reserved
- Assigned by
- ENISA
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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ENISACNA (assigner) | 4.0 | Medium4.4 | 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 |
| NVDNVD · Deferred | 4.0 | Medium4.4 | 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 |
- EPSS (exploitation in 30 days)
- 0.12% · top 98% of all CVEs (6 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.4.
Weakness
Affected products
Estonian Information System Authority (RIA) · libdigidocpp
- affected 4.1.0 – < 4.2.1
Estonian Information System Authority (RIA) · DigiDoc4
- affected 4.7.0 – < 4.8.2
Estonian Information System Authority (RIA) · DigiDoc
- affected 2.7.0 – < 2.7.2
Estonian Information System Authority (RIA) · DigiDoc
- affected 2.8.0 – < 2.8.1
What to do
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.
References (3)
- https://github.com/open-eid/libdigidocpp/pull/690 (opens in a new tab)patchexploit
- https://www.id.ee/en/article/ria-soovitab-kasutajatel-uuendada-id-tarkvara-eng/ (opens in a new tab)vendor-advisory
- https://www.ria.ee/blogi/digidoc-rakendustes-esinenud-turvanorkus-mis-juhtus-ja-kuidas-see-parandati (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-59112)Record last updated .