CVE-2026-35058 | Improper validation of packet length during tls-crypt-v2 key… | CVSS 6.9 MEDIUM

Description

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.

Metadata

CVE ID: CVE-2026-35058
State: PUBLISHED
Assigner: OpenVPN
Reserved: 2026-04-13 10:28 UTC
Published: 2026-06-08 19:29 UTC
Last updated: 2026-06-08 19:49 UTC
Primary CWE: CWE-617
CWE-617 Reachable assertion
Vendor / Product: OpenVPN / OpenVPN
Sources: cve.org · NVD

Severity & Metrics

6.9 MEDIUM CVSS 4.0

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
OpenVPN	OpenVPN	—	2.6.0 ≤ 2.6.19, 2.7_alpha1 ≤ 2.7.1

Weakness (CWE)

CWE	Source	Description
CWE-617	cna	CWE-617 Reachable assertion

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.9	MEDIUM	4.0	cna	CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

References (3)