Name: CVE-2026-78135: Improper Enforcement of Behavioral Workflow
Creator: Rapid7
Published: 2026-09-11T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-78135, CWE-841, CVSS 7.3, EPSS 0.00362

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.

CVSS Details

CVSS 3.1 Base Score: 7.3
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade strongswan	Sep 21, 2026	Sep 11, 2026
Freebsd	—	Upgrade strongswan	Sep 18, 2026	Sep 10, 2026
Ubuntu	—	Upgrade libstrongswanUpgrade strongswan	Sep 21, 2026	Sep 11, 2026

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CVSS Details

Covered by Rapid7

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