CVE-2026-78133
HIGHCVSS 7.5/10EPSS 0.42%
Last modified
CVE-2026-78133 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. libcharon in strongSwan 6.0.0 through 6.0.7 has a use-after-free in IKEv2 rekeying collision handling.. EPSS estimates a 0.42% chance of exploitation in the next 30 days.
Description
libcharon in strongSwan 6.0.0 through 6.0.7 has a use-after-free in IKEv2 rekeying collision handling.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Strongswan | Strongswan | >= 6.0.0, < 6.1.0 |
References
- https://github.com/strongswan/strongswan/releases/tag/6.1.0Patch, Release Notes, Vendor Advisory
- https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78133).htmlMitigation, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-78133?
libcharon in strongSwan 6.0.0 through 6.0.7 has a use-after-free in IKEv2 rekeying collision handling.
How severe is CVE-2026-78133?
CVE-2026-78133 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.
How do I fix CVE-2026-78133?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2026-78133?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST