CVE-2026-110240: medium-severity vulnerability in duke-git lancet
Lancet through 2.3.9 SSRF Protection Bypass via netutil.IsInternalIP
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.3epss 0.3%
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.
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
Affected products
duke-git · lancetRelated CVEs — duke-git lancet
In the same product, most dangerous first.
References
https://github.com/duke-git/lancethttps://github.com/duke-git/lancet/blob/v1.4.6/netutil/net.go#L158-L170https://github.com/duke-git/lancet/blob/v2.3.9/netutil/net.go#L192-L205https://github.com/duke-git/lancet/commit/835111c832939a85416d686a1e99d5fe7060c9b4https://github.com/duke-git/lancet/issues/356https://github.com/duke-git/lancet/pull/357https://www.vulncheck.com/advisories/lancet-through-2.3.9-ssrf-protection-bypass-via-netutil-isinternalip