CVE-2026-78133

HIGH 7.5CVE-2026-78133 · Published 11/09/2026 · updated 14/09/2026

In short

CVE-2026-78133 is a HIGH (CVSS 7.5) vulnerability affecting strongswan (strongswan).
Chance of exploitation in the next 30 days (EPSS): 0.47%, higher than 40.3% of all vulnerabilities.
Fix: update to 6.1.0 or later.

Package	Affected versions	Patched versions
strongswan strongswan	`≥ 6.0.0, < 6.1.0`	`6.1.0`

libcharon in strongSwan 6.0.0 through 6.0.7 has a use-after-free in IKEv2 rekeying collision handling.

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Package

Affected versions

Patched versions

≥ 6.0.0, < 6.1.0

6.1.0

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