Signature validation vulnerability affecting DigiDoc applications
Priority MEDIUM 54CWE-347Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-347.
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00121 1st percentileScored 2026-11-07
Fix Fixed libdigidocpp (Estonian Information System Authority (RIA)): 4.2.1DigiDoc4 (Estonian Information System Authority (RIA)): 4.8.2+1 more product
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Estonian Information System Authority (RIA) | libdigidocpp | 4.1.0 to before 4.2.1 | 4.2.1 | Patch available | CNA |
| Estonian Information System Authority (RIA) | DigiDoc4 | 4.7.0 to before 4.8.2 | 4.8.2 | Patch available | CNA |
| Estonian Information System Authority (RIA) | DigiDoc | 2.7.0 to before 2.7.2 | 2.7.2 | Patch available | CNA |
| Estonian Information System Authority (RIA) | DigiDoc | 2.8.0 to before 2.8.1 | 2.8.1 | Patch available | CNA |
- libdigidocpp VendorEstonian Information System Authority (RIA) Affected 4.1.0 to before 4.2.1 Fixed in 4.2.1 Patch available CNA
- DigiDoc4 VendorEstonian Information System Authority (RIA) Affected 4.7.0 to before 4.8.2 Fixed in 4.8.2 Patch available CNA
- DigiDoc VendorEstonian Information System Authority (RIA) Affected 2.7.0 to before 2.7.2 Fixed in 2.7.2 Patch available CNA
- DigiDoc VendorEstonian Information System Authority (RIA) Affected 2.8.0 to before 2.8.1 Fixed in 2.8.1 Patch available CNA
Remediation
- Fix · CNA libdigidocpp (Estonian Information System Authority (RIA)) Fixed in 4.2.1
- Fix · CNA DigiDoc4 (Estonian Information System Authority (RIA)) Fixed in 4.8.2
- Fix · CNA DigiDoc (Estonian Information System Authority (RIA)) Fixed in 2.7.2
- Fix · CNA DigiDoc (Estonian Information System Authority (RIA)) Fixed in 2.8.1
Timeline
- 2026-10-02 Threatist record created from CVE-2026-59112
- 2026-10-03 Alias added: GHSA-cwph-2586-4qwc
References
More Estonian Information System Authority (RIA) vulnerabilities
- TI-2026-49182 Arbitrary file overwrite vulnerability in DigiDoc4 client CVSS 4.0HIGH 8.4
Sources
- CVE-2026-59112 · CVE Program
- CVE-2026-59112 · NVD
- FIRST EPSS
- GHSA-cwph-2586-4qwc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences