PatchTheCVEstrongswan vulnerabilities and fixes
Recent CVEs affecting strongswan, with upgrade or downgrade steps. 11 tracked.
strongswan has 11 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 11. Most recent: 2026-09-11. Highest priority: CVE-2026-78123 (score 41/100).
- CVE-2026-78135 MEDIUM 5.6 UPGRADE libcharon in strongSwan 5.9.7 through 6.0.7 mishandles behavioral workflow in the IKEv2 state machine
- CVE-2026-78130 HIGH 7.5 UPGRADE strongSwan 4.2.0 through 6.0.7 has a NULL pointer dereference in the x509 plugin's attribute certificate parse
- CVE-2026-78123 MEDIUM 5.9 UPGRADE strongSwan 5.0.2 through 6.0.7 has an Expired Pointer Dereference in PKCS#7 parsing in the openssl plugin.
- CVE-2026-78124 LOW 3.7 UPGRADE strongSwan 5.0.2 through 6.0.7 allows PKCS#7 certificate enumeration in the openssl plugin that leads to a lac
- CVE-2026-78126 MEDIUM 5.9 UPGRADE strongSwan 4.1.10 through 6.0.7 allows a NULL pointer dereference in the eap-aka plugin.
- CVE-2026-78127 LOW 3.7 UPGRADE libcharon in strongSwan 4.1.2 through 6.0.7 has a missing release of memory after its effective lifetime in th
- CVE-2026-78129 MEDIUM 5.9 UPGRADE strongSwan 4.6.2 through 6.0.7 has an infinite loop in PKCS#5 decryption.
- CVE-2026-78131 LOW 3.7 UPGRADE strongSwan 4.2.0 through 6.0.7 has a missing release of memory after its effective lifetime in the x509 plugin
- CVE-2026-78132 HIGH 7.5 UPGRADE strongSwan 5.1.3 through 6.0.7 has an infinite loop in the x509 plugin's attribute certificate parser for ietf
- CVE-2026-78133 HIGH 7.5 UPGRADE libcharon in strongSwan 6.0.0 through 6.0.7 has a use-after-free in IKEv2 rekeying collision handling.
- CVE-2026-78134 HIGH 7.1 UPGRADE strongSwan 4.5.0 through 6.0.7 has Incorrect Access Control in the eap-ttls and eap-peap plugins because there
FAQ
How do I fix strongswan vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is strongswan being exploited right now?
None of the tracked strongswan CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which strongswan CVE should I patch first?
CVE-2026-78123 currently ranks highest (41/100): strongSwan 5.0.2 through 6.0.7 has an Expired Pointer Dereference in PKCS#7 parsing in the openssl plugin..