# CVE-2026-12932: OpenVPN memory leak in tls-crypt-v2 client key extraction

Source: https://junglewise.ai/threats/cve-2026-12932-openvpn-memory-leak-in-tls-crypt-v2-client-key-extraction  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-30. Updated: 2026-07-30  
License: CC BY 4.0 with a link back

CVE-2026-12932 · Severity: info · CVSS 7.1 · Published 2026-07-30

OpenVPN is a widely used software for creating secure private network connections. A flaw in how it handles specific security keys allows an attacker to repeatedly send specially crafted data packets that consume the server's memory. This can eventually crash the service, preventing legitimate users from connecting to the VPN and disrupting remote access for the organization.

Technologies: [Openvpn](https://junglewise.ai/threats/technologies/openvpn). Vendors: [Openvpn](https://junglewise.ai/threats/vendors/openvpn).

## Quick answers

**Is CVE-2026-12932 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-12932 being exploited in the wild.

**How severe is CVE-2026-12932?** Informational severity, with a CVSS score of 7.1, published 30 July 2026.

**Which products and versions are affected?** Openvpn 2.5.0 through 2.6.20, 2.7_alpha1 through 2.7.4.

**Is there a fix for CVE-2026-12932?** A patch was published on 2026-07-01: OpenVPN versions 2.6.21 and 2.7.5 released to address the issue. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-12932 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-12932?** Check whether you run Openvpn at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A memory leak vulnerability (CWE-401) exists in OpenVPN's tls-crypt-v2 client key extraction component. The flaw is triggered during the processing of crafted packets, where the application fails to release memory after its effective lifetime. A remote attacker with low privileges can exploit this over the network by flooding the service with these packets, leading to memory exhaustion and a Denial of Service (DoS) condition. The issue affects versions 2.5.0 through 2.6.20 and 2.7_alpha1 through 2.7.4, and has been addressed in versions 2.6.21 and 2.7.5.

## Affected products

- OpenVPN OpenVPN 2.5.0 through 2.6.20, 2.7_alpha1 through 2.7.4

## Timeline

- 2026-07-01: patched: OpenVPN versions 2.6.21 and 2.7.5 released to address the issue.
- 2026-07-30: advisory: CVE-2026-12932 published.

## References

- [https://community.openvpn.net/ReleaseHistory](https://community.openvpn.net/ReleaseHistory)
- [https://community.openvpn.net/ReleaseHistory](https://community.openvpn.net/ReleaseHistory)
- [https://community.openvpn.net/Security%20Announcements/CVE-2026-12932](https://community.openvpn.net/Security%20Announcements/CVE-2026-12932)

## Related threats

- [OpenVPN use-after-free in TLS session promotion or expiry](https://junglewise.ai/threats/cve-2026-84471-the-fix-for-was-incomplete-a-use-after-free-in-openvpn-2-6-0)
- [OpenVPN integer underflow in domain search options](https://junglewise.ai/threats/cve-2026-88964-an-integer-underflow-in-openvpn-version-2-7-alpha3-through-2-7-7)
- [OpenVPN identity impersonation via embedded NUL in certificate subject](https://junglewise.ai/threats/cve-2026-84790-openvpn-2-7-alpha1-through-2-7-7-allows-remote-authenticated)
- [OpenVPN ACK packet retransmission denial of service](https://junglewise.ai/threats/cve-2026-84732-openvpn-ack-packet-retransmission-denial-of-service)
- [OpenVPN argument parsing vulnerability on Windows](https://junglewise.ai/threats/cve-2026-84256-openvpn-argument-parsing-vulnerability-on-windows)