{"id":"CVE-2026-78135","state":"PUBLISHED","title":"libcharon in strongSwan 5.9.7 through 6.0.7 mishandles behavioral workflow in the IKEv2 state machine. Because CREATE_CHILD_SA requests are mishandled, there can be an authenticati","description":"libcharon in strongSwan 5.9.7 through 6.0.7 mishandles behavioral workflow in the IKEv2 state machine. Because CREATE_CHILD_SA requests are mishandled, there can be an authentication bypass.","publishedAt":"2026-09-11T02:07:28.763Z","updatedAt":"2026-09-15T15:32:51.934Z","severity":{"score":5.6,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","source":"mitre"},"assigner":"mitre","products":["strongSwan strongSwan"],"affected":[{"vendor":"strongSwan","product":"strongSwan","defaultStatus":"unaffected","versions":[{"version":"5.9.7","status":"affected","lessThan":"6.1.0","versionType":"semver"}]}],"references":["https://github.com/strongswan/strongswan/releases/tag/6.1.0","https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78135).html"],"weaknesses":["CWE-841"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/78xxx/CVE-2026-78135.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-78135","state":"PUBLISHED","datePublished":"2026-09-11T02:07:28.763Z","dateUpdated":"2026-09-15T15:32:51.934Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2026-08-22T23:41:22.635Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"libcharon in strongSwan 5.9.7 through 6.0.7 mishandles behavioral workflow in the IKEv2 state machine. Because CREATE_CHILD_SA requests are mishandled, there can be an authentication bypass."}],"affected":[{"vendor":"strongSwan","product":"strongSwan","defaultStatus":"unaffected","versions":[{"version":"5.9.7","status":"affected","lessThan":"6.1.0","versionType":"semver"}]}],"references":[{"url":"https://github.com/strongswan/strongswan/releases/tag/6.1.0"},{"url":"https://www.strongswan.org/blog/2026/09/07/strongswan-vulnerability-(cve-2026-78135).html"}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.6,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-841","description":"CWE-841 Improper Enforcement of Behavioral Workflow","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"mitre","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateUpdated":"2026-09-11T02:07:28.763Z"},"x_generator":{"engine":"CVE-Request-form 0.0.1"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:strongswan:strongswan:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9.7","versionEndExcluding":"6.1.0"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-15T15:32:40.015957Z","id":"CVE-2026-78135","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-15T15:32:51.934Z"}}]}}}