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CVE-2026-70383

Arbitrary file overwrite vulnerability in DigiDoc4 client

HIGH
8.4
CVSS Score
Published: August 20, 2026 at 02:04 PM UTC
Updated: October 18, 2026 at 08:10 PM UTC
1 product affected across 1 vendorDigiDoc4

Using DigiDoc4 by Estonian Information System Authority (RIA)?

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Severity
HIGH8.4
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

DigiDoc4· Estonian Information System Authority Ria
90%
4.0.0 ≤ v < 4.11.04.0.0
Affected range stops below 4.11.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (3)

Patch
Source: cverecord
https://github.com/open-eid/libdigidocpp/pull/736
Patch
Source: cverecord
https://github.com/open-eid/DigiDoc4-Client/pull/1402
Product
Source: cverecord
https://github.com/open-eid/DigiDoc4-Client

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.4HIGHENISA
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-22

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