What is CVE-2026-78124?

CVE-2026-78124 is a low-severity vulnerability in Strongswan, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 3.7/10. Published 2026-09-11.

How severe is CVE-2026-78124?

Low severity. CVSS v3 base score is 3.7 out of 10.

Vulnerability in Strongswan

CVE-2026-78124

strongSwan 5.0.2 through 6.0.7 allows PKCS#7 certificate enumeration in the openssl plugin that leads to a lack of release of memory after its effective lifetime.

Published 2026-09-11 · last modified 2026-09-14.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (16.7th percentile), scored 2026-10-26.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 16.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

Strongswan

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

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-2026-78124).ht… (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-78124?: CVE-2026-78124 is a low-severity vulnerability in Strongswan, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 3.7/10. Published 2026-09-11.
How severe is CVE-2026-78124?: Low severity. CVSS v3 base score is 3.7 out of 10.