CVE-2026-78135

EUVD-2026-75921
libcharon in strongSwan 5.9.7 through 6.0.7 mishandles behavioral workflow in the IKEv2 state machine. Because CREATE_CHILD_SA requests are mishandled, there can be an authentication bypass.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mitreCNA
5.6 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 26.63%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
strongswanstrongswan
5.9.7 ≤
𝑥
< 6.1.0
CNA
Debian logo
Debian Releases
Debian Product
Codename
strongswan
bookworm
vulnerable
bookworm (security)
vulnerable
forky
vulnerable
sid
6.1.0-2
fixed
trixie
vulnerable
trixie (security)
6.0.1-6+deb13u7
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
strongswan
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
resolute
needs-triage
trusty
needs-triage
xenial
needs-triage
openSUSE logo
openSUSE / SLES Releases
openSUSE Product
Release
strongswan
suse enterprise desktop 15 SP7
5.9.14-150700.3.21.2
fixed
suse enterprise sap 15 SP7
5.9.14-150700.3.21.2
fixed
suse enterprise server 15 SP7
5.9.14-150700.3.21.2
fixed
strongswan-doc
suse enterprise desktop 15 SP7
5.9.14-150700.3.21.2
fixed
suse enterprise sap 15 SP7
5.9.14-150700.3.21.2
fixed
suse enterprise server 15 SP7
5.9.14-150700.3.21.2
fixed
strongswan-hmac
suse enterprise desktop 15 SP7
5.9.14-150700.3.21.2
fixed
suse enterprise sap 15 SP7
5.9.14-150700.3.21.2
fixed
suse enterprise server 15 SP7
5.9.14-150700.3.21.2
fixed
strongswan-ipsec
suse enterprise desktop 15 SP7
5.9.14-150700.3.21.2
fixed
suse enterprise sap 15 SP7
5.9.14-150700.3.21.2
fixed
suse enterprise server 15 SP7
5.9.14-150700.3.21.2
fixed
strongswan-libs0
suse enterprise desktop 15 SP7
5.9.14-150700.3.21.2
fixed
suse enterprise sap 15 SP7
5.9.14-150700.3.21.2
fixed
suse enterprise server 15 SP7
5.9.14-150700.3.21.2
fixed