CVE-2026-70383 Arbitrary file overwrite vulnerability in DigiDoc4 client
An attacker can overwrite arbitrary files on the system via path traversal in the DigiDoc4 client, requiring an upgrade to mitigate.
- 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-2026-70383?
CVE-2026-70383 is a high-severity path traversal vulnerability in Estonian Information System Authority (RIA) DigiDoc4, published on 20 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 Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Estonian Information System Authority (RIA) DigiDoc4 client.
This issue affects DigiDoc4: from 4.0.0 before 4.11.0.
Weakness: CWE-22
Which versions are affected by CVE-2026-70383?
How do I fix CVE-2026-70383?
No fix has been published for CVE-2026-70383 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-70383 being exploited?
There is no known exploitation of CVE-2026-70383 in the wild and no public exploit code.
Sources
Also known as GHSA-48r4-r7pv-pj69.