CVE-2026-78135

high

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.

References

https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78135).html

https://github.com/strongswan/strongswan/releases/tag/6.1.0

Details

Source: Mitre, NVD

Published: 2026-09-11

Updated: 2026-09-16

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 7.3

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L