CVE-2026-59112 Signature validation vulnerability affecting DigiDoc applications
Attackers can bypass cryptographic signature validation in DigiDoc applications, potentially allowing forged documents to appear legitimate.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-59112?
CVE-2026-59112 is a medium-severity vulnerability in Estonian Information System Authority (RIA) DigiDoc, published on 10 Aug 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-59112?
How do I fix CVE-2026-59112?
No fix has been published for CVE-2026-59112 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-59112 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-59112 exists.
Sources
Also known as GHSA-cwph-2586-4qwc, UBUNTU-CVE-2026-59112.