6.0Medium

CVE-2026-12996

OpenVPN OpenVPN Published: 2026-07-30 19:38 (3 months ago)

Description

A use-after-free in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote authenticated peers to potentially cause a denial of service or leak memory via crafted packets during TLS session promotion or expiry

Weakness (CWE): CWE-416 CWE-125

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
debian	debian linux	11.0
OpenVPN	OpenVPN	2.6.0 – ≤ 2.6.20, 2.7_alpha1 – ≤ 2.7.4

References and patches

https://community.openvpn.net/Security%20Announcements/CVE-2026-12996 vendor-advisoryVendor Advisory
https://community.openvpn.net/ReleaseHistory#openvpn-275-released-1-july-2026 release-notesRelease Notes
https://community.openvpn.net/ReleaseHistory#openvpn-2621-released-1-july-2026 release-notesRelease Notes
https://lists.debian.org/debian-lts-announce/2026/07/msg00013.html Mailing ListThird Party Advisory

CPE matches (NVD) (3)

cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:* ≥ 2.6.0 < 2.6.21
cpe:2.3:a:openvpn:openvpn:*:*:*:*:*:*:*:* ≥ 2.7 < 2.7.5
cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

CVSS score

6.0Medium

Source: OpenVPN · CVSS 4.0

Attack vector: Network
Attack complexity: High
Attack requirements: Present
Privileges required: Low
User interaction: None
Confidentiality: Low
Integrity: None
Availability: High

CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N

All scores (3)

cna	CVSS 4.0	6.0Medium
security@openvpn.net	CVSS 4.0	6.0Medium
nvd	CVSS 3.1	8.1High

EPSS (chance of exploitation in 30 days)

0.46%

higher than 40% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: no
Technical impact: partial

Timeline

ID reserved2026-06-23
Published2026-07-30 19:38
Reached IP-DB2026-10-24 23:39
Last updated2026-08-05 22:38

Assigned by (CNA): OpenVPN
NVD status: Analyzed

View at source: CVE.org · NVD

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