CVE-2026-13122

EUVD-2026-41880
OpenVPN version 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote attackers to cause a denial of service via a malformed authentication token that triggers a reachable assertion when external-auth is enabled
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
OpenVPNCNA
5.9 MEDIUM
NETWORK
HIGH
LOW
CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
openvpnopenvpn
2.6.0 ≤
𝑥
≤ 2.6.20
CNA
openvpnopenvpn
𝑥
≤ 2.7.4
CNA
Debian logo
Debian Releases
Debian Product
Codename
openvpn
bookworm
vulnerable
bookworm (security)
2.6.14-0+deb12u2
fixed
bullseye
vulnerable
bullseye (security)
vulnerable
forky
2.7.5-1
fixed
sid
2.7.5-1
fixed
trixie
vulnerable
trixie (security)
2.6.14-1+deb13u3
fixed