Not a U.S. government website. NDD is an independent vulnerability database by Volerion and is not affiliated with or endorsed by NIST or NVD.

CVE-2026-78135 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:7.3 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CNA: [email protected]CVSS-B:5.6 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.

URL	Source(s)	Tag(s)
https://github.com/strongswan/strongswan/releases/tag/6.1.0	[email protected]	Release NotesVendor Advisory
https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78135).html	[email protected]	Vendor AdvisoryMitigation

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-841	Improper Enforcement of Behavioral Workflow	[email protected]

Affected Products

Product	Versions
strongswan strongswan	>= 5.9.7, <= 6.0.7
CPE cpe:2.3:a:strongswan:strongswan:::::::: Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Sep 16, 2026	Initial Analysis	[email protected]
Sep 15, 2026	CVE Modified	CISA-ADP
Sep 11, 2026	New CVE Received	[email protected]