Auth bypass in Strongswan
CVE-2026-78134
strongSwan 4.5.0 through 6.0.7 has Incorrect Access Control in the eap-ttls and eap-peap plugins because there can be a missing or mismatched inner EAP identity.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.005 (38.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.001
Affected products
Weakness classification (CWE)
References
- github.com/strongswan/strongswan/releases/tag/6.1.0 (Patch, Release Notes, Vendor Advisory)
- www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78134).ht… (Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-78134?
- CVE-2026-78134 is a high-severity vulnerability in Strongswan, classified under Incorrect Authorization. CVSS score: 7.1/10. Published 2026-09-11.
- How severe is CVE-2026-78134?
- High severity. CVSS v3 base score is 7.1 out of 10.