---
title: "CVE-2026-78134: strongSwan - Broken Access Control"
description: "strongSwan 4.5.0 through 6.0.7 contains an incorrect access control vulnerability caused by missing or mismatched inner EAP identity in eap-ttls and eap-peap plugins, letting attackers bypass access restrictions, exploit requires crafted EAP messages."
url: https://panop.io/threat-heartbeat/CVE-2026-78134/
---

# CVE-2026-78134 strongSwan - Broken Access Control

strongSwan 4.5.0 through 6.0.7 contains an incorrect access control vulnerability caused by missing or mismatched inner EAP identity in eap-ttls and eap-peap plugins, letting attackers bypass access restrictions, exploit requires crafted EAP messages.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.32% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-78134)

## Details

Type

Broken Access Control

Impact

Broken Access Control

CVSS vector

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

Published

11 September 2026

Updated

15 October 2026

Weakness

[CWE-863](https://cwe.mitre.org/data/definitions/863.html)

## Vendor fix

Update to a version later than 6.0.7 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-78134](https://nvd.nist.gov/vuln/detail/CVE-2026-78134)
- [https://github.com/strongswan/strongswan/releases/tag/6.1.0](https://github.com/strongswan/strongswan/releases/tag/6.1.0)
- [https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78134).html](https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-%28cve-2026-78134%29.html)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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