{"id":"CVE-2026-110240","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-110240","generatedAt":"2026-10-28T03:30:04.593Z","title":"Lancet through 2.3.9 contains an SSRF protection bypass vulnerability in netutil.IsInternalIP that misclassifies IPv6 private, link-local, CGNAT and transition addresses as external.","description":"Lancet through 2.3.9 contains an SSRF protection bypass vulnerability in netutil.IsInternalIP that misclassifies IPv6 private, link-local, CGNAT and transition addresses as external. Attackers can supply hostnames resolving to these address forms, including NAT64, 6to4 or Teredo embedding internal IPv4, to reach internal services or cloud metadata endpoints.","published":"2026-10-13T19:18:49.000Z","lastModified":"2026-10-13T20:17:28.000Z","status":"Awaiting Analysis","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":6.3,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-918"],"affected":[],"epss":{"score":0.0033,"percentile":0.25937,"date":"2026-10-26","history":[{"date":"2026-10-14","score":0.0033,"percentile":0.24441}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.33%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-13T19:18:49.000Z","detail":{"score":"6.3","severity":"MEDIUM","publishedAt":"2026-10-13T19:18:49.350Z"},"summary":"New CVE, medium severity (CVSS 6.3)."}],"references":[{"url":"https://github.com/duke-git/lancet","source":"disclosure@vulncheck.com"},{"url":"https://github.com/duke-git/lancet/blob/v1.4.6/netutil/net.go#L158-L170","source":"disclosure@vulncheck.com"},{"url":"https://github.com/duke-git/lancet/blob/v2.3.9/netutil/net.go#L192-L205","source":"disclosure@vulncheck.com"},{"url":"https://github.com/duke-git/lancet/commit/835111c832939a85416d686a1e99d5fe7060c9b4","source":"disclosure@vulncheck.com"},{"url":"https://github.com/duke-git/lancet/issues/356","source":"disclosure@vulncheck.com"},{"url":"https://github.com/duke-git/lancet/pull/357","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/lancet-through-2.3.9-ssrf-protection-bypass-via-netutil-isinternalip","source":"disclosure@vulncheck.com"},{"url":"https://github.com/duke-git/lancet/issues/356","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-110240","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}