# CVE-2026-13379: Denial of service in OpenVPN

> Remote attackers can crash the OpenVPN service or pollute DNS state via crafted search domains during disconnection.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:N/VA:L/SC:H/SI:N/SA:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 30 Jul 2026
- **Updated:** 30 Jul 2026
- **Also known as:** GHSA-hpxm-29ww-fvf4

## What is CVE-2026-13379?

CVE-2026-13379 is a medium-severity denial of service vulnerability in OpenVPN, published on 30 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

The Windows interactive service in OpenVPN 2.7_alpha1 through 2.7.4 allows remote attackers to cause persistent DNS state pollution or a service crash via a crafted search domain during the disconnection process

Weakness: CWE-142 (Improper Neutralization of Value Delimiters), CWE-125 (Out-of-bounds Read)

## Which versions are affected by CVE-2026-13379?

It affects 1 product.


Products: Openvpn Openvpn.

## How do I fix CVE-2026-13379?

Upgrade to a fixed version.

## Is CVE-2026-13379 being exploited?

There is no known exploitation of CVE-2026-13379 in the wild and no public exploit code.

## Other vulnerabilities in OpenVPN

- [CVE-2025-12106](https://insights.sbomify.com/CVE-2025-12106/): Memory corruption in OpenVPN (critical 9.1)
- [CVE-2024-5594](https://insights.sbomify.com/CVE-2024-5594/): Information disclosure in OpenVPN (critical 9.1)
- [CVE-2018-7544](https://insights.sbomify.com/CVE-2018-7544/): Cross-site request forgery in n/a (critical 9.1)
- [CVE-2006-1629](https://insights.sbomify.com/CVE-2006-1629/): Code injection in n/a (critical 9.0)
- [CVE-2024-4877](https://insights.sbomify.com/CVE-2024-4877/): Privilege escalation in OpenVPN (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-13379 and fix it if it is affected.

What it is: CVE-2026-13379 is a medium-severity denial of service vulnerability in OpenVPN, published on 30 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-13379 in the wild and no public exploit code.

Affected product: OpenVPN. 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-2026-13379/ (Markdown: https://insights.sbomify.com/CVE-2026-13379/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-13379
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-13379
- OSV: https://osv.dev/vulnerability/CVE-2026-13379

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-13379/
Summaries are generated and may contain mistakes; the official description above is the record.