CVE-2026-78135

HIGH CVSS 3.1: 7.3 EPSS 0.34%
Updated Sep 16, 2026
Strongswan
Parameter Value
CVSS 7.3 (HIGH)
Affected Versions 5.9.7 — 6.0.7
Type CWE-841
Vendor Strongswan
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
Low
Partial data leak
Integrity
Low
Partial data modification
Availability
Low
Partial disruption

CVSS Vector v3.1

Weakness Type (CWE)

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Strongswan Strongswan
cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*
5.9.7 <= 6.0.7