Medium severity4.8NVD Advisory· Published Oct 13, 2026· Updated Oct 13, 2026
CVE-2026-110240
CVE-2026-110240
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.
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Affected products
1Patches
Vulnerability mechanics
References
6- github.com/duke-git/lancet/blob/v1.4.6/netutil/net.gonvd
- github.com/duke-git/lancet/blob/v2.3.9/netutil/net.gonvd
- github.com/duke-git/lancet/commit/835111c832939a85416d686a1e99d5fe7060c9b4nvd
- github.com/duke-git/lancet/issues/356nvd
- github.com/duke-git/lancet/pull/357nvd
- www.vulncheck.com/advisories/lancet-through-2.3.9-ssrf-protection-bypass-via-netutil-isinternalipnvd
News mentions
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