# CVE-2026-78135

## Summary

- **CVE ID:** CVE-2026-78135
- **Severity:** MEDIUM
- **CVSS Score:** 5.6 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L)
- **CWE:** CWE-841
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 11, 2026

## 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.

## Affected Products

- strongSwan — strongSwan (5.9.7)

## References

- [CNA](https://github.com/strongswan/strongswan/releases/tag/6.1.0)
- [CNA](https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78135).html)

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._