# CVE-2026-0392: eParakstītājs 3.0 for Windows – remote code execution via unauthenticated auto-update

> Man-in-the-middle attackers can execute arbitrary code by serving malicious updates due to missing certificate and signature validation in the auto-update mechanism.

- **Severity:** High 7.3 (`CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **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 available:** No
- **Published:** 3 Aug 2026
- **Updated:** 5 Aug 2026
- **Also known as:** GHSA-gw22-gf8m-29g5

## What is CVE-2026-0392?

CVE-2026-0392 is a high-severity code injection vulnerability in Latvijas Valsts radio un televīzijas centrs (LVRTC) eParakstītājs 3.0, published on 3 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

eParakstītājs 3.0 for Windows before version
1.10.0 retrieves and executes its automatic updates over a channel that is not
authenticated or integrity-protected. On each launch the application fetches an
update descriptor (XML) over TLS but accepts any TLS certificate (a permissive
TrustManager and a HostnameVerifier that always returns true), does not verify
any digital signature on the update descriptor, and does not verify the
Authenticode signature or a checksum of the downloaded installer before running
it. A man-in-the-middle attacker able to redirect www.eparaksts.lv can serve a
crafted update descriptor pointing to an attacker-controlled executable, which
the client downloads and executes, resulting in arbitrary code execution on the
victim host.

Weakness: CWE-494 (Download of Code Without Integrity Check), CWE-347 (Improper Verification of Cryptographic Signature), CWE-295 (Improper Certificate Validation)

## Which versions are affected by CVE-2026-0392?


## How do I fix CVE-2026-0392?

No fix has been published for CVE-2026-0392 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-0392 being exploited?

There is no known exploitation of CVE-2026-0392 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-0392 and fix it if it is affected.

What it is: CVE-2026-0392 is a high-severity code injection vulnerability in Latvijas Valsts radio un televīzijas centrs (LVRTC) eParakstītājs 3.0, published on 3 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.
Exploitation: There is no known exploitation of CVE-2026-0392 in the wild and no public exploit code.

Affected product: Latvijas Valsts radio un televīzijas centrs (LVRTC) eParakstītājs 3.0. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-0392/ (Markdown: https://insights.sbomify.com/CVE-2026-0392/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-0392
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-0392
- OSV: https://osv.dev/vulnerability/CVE-2026-0392

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-0392/
Summaries are generated and may contain mistakes; the official description above is the record.