What is CVE-2026-35058?

CVE-2026-35058 is a medium-severity vulnerability in Openvpn, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-06-08.

How severe is CVE-2026-35058?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Openvpn

CVE-2026-35058

Improper validation of packet length during tls-crypt-v2 key extraction in OpenVPN 2.6.0 through 2.6.19 and 2.7_alpha1 through 2.7.1 allows authenticated attackers to trigger a fatal assertion and cause a denial of service via a specially crafted packet.

EPSS: 0.005 (43.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Openvpn — versions 2.6.0, 2.7_alpha1

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

security@openvpn.net (release-notes, Release Notes)
security@openvpn.net (release-notes, Release Notes)
security@openvpn.net (vendor-advisory, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Exploit, Third Party Advisory, Mitigation)

Frequently asked questions

What is CVE-2026-35058?: CVE-2026-35058 is a medium-severity vulnerability in Openvpn, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-06-08.
How severe is CVE-2026-35058?: Medium severity. CVSS v3 base score is 6.5 out of 10.