strongSwan vulnerabilities: known CVEs & security history
strongSwan · Network / VPN · 11 tracked CVEs · 0 actively exploited · updated September 2026 · what is a CVE? →
This is the full list of known vulnerabilities (CVEs) across all strongSwan release lines — 11 in total. A CVE here doesn't mean your version is affected — check strongSwan's current status and the safe version to run.
Known strongSwan CVEs
Actively-exploited and most-severe first. Open any CVE for full details.
| CVE | Severity | CVSS | EPSS | Year |
|---|---|---|---|---|
| CVE-2026-78133 | high | 7.5 | 0% | 2026 |
| CVE-2026-78132 | high | 7.5 | 0% | 2026 |
| CVE-2026-78130 | high | 7.5 | 0% | 2026 |
| CVE-2026-78134 | high | 7.1 | 0% | 2026 |
| CVE-2026-78129 | medium | 5.9 | 0% | 2026 |
| CVE-2026-78126 | medium | 5.9 | 0% | 2026 |
| CVE-2026-78123 | medium | 5.9 | 0% | 2026 |
| CVE-2026-78135 | medium | 5.6 | 0% | 2026 |
| CVE-2026-78131 | low | 3.7 | 0% | 2026 |
| CVE-2026-78127 | low | 3.7 | 0% | 2026 |
| CVE-2026-78124 | low | 3.7 | 0% | 2026 |
Is my strongSwan version affected?
The list above spans every release. To know whether your version is affected — and the minimum safe version to upgrade to — check it directly.
Check your strongSwan version → · Monitor strongSwan for new CVEs →
strongSwan vulnerabilities — frequently asked
How many known vulnerabilities does strongSwan have?
IsItPatched tracks 11 CVEs for strongSwan. 0 are critical-severity and 4 high-severity. These span every release line — what matters is whether the version you run is affected.
Does strongSwan have any actively-exploited vulnerabilities?
None of strongSwan's tracked CVEs are currently in CISA's KEV catalog — but new ones can be added at any time, so keep your version current.
What is the most severe strongSwan vulnerability?
Among tracked issues, CVE-2026-78133 (HIGH, CVSS 7.5) ranks highest — a Use-after-free weakness.
Is strongSwan safe to use?
It depends on the version. The latest supported strongSwan release clears the known issues; older versions may still be affected. Check the exact version you run for a verdict.
CVE data aggregated from NVD, CISA KEV and EPSS (FIRST.org). Related: strongSwan security status · strongSwan end-of-life · actively-exploited CVEs. Always verify against strongSwan's advisories — see our disclaimer.