CVE-2026-110240CWE-918ssrf

CVE-2026-110240

Medium · published October 13, 2026

CVSS v3.1
4.8
EPSS
0%
Percentile
24.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
6.3 · 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
EPSS
0.00330 · 24.9th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-10-13T23:18Z
References (8)
https://github.com/duke-git/lancet · [email protected]https://github.com/duke-git/lancet/blob/v1.4.6/netutil/net.go#L158-L170 · [email protected]https://github.com/duke-git/lancet/blob/v2.3.9/netutil/net.go#L192-L205 · [email protected]https://github.com/duke-git/lancet/commit/835111c832939a85416d686a1e99d5fe7060c9b4 · [email protected]https://github.com/duke-git/lancet/issues/356 · [email protected]https://github.com/duke-git/lancet/pull/357 · [email protected]https://www.vulncheck.com/advisories/lancet-through-2.3.9-ssrf-protection-bypass-via-netutil-isinternalip · [email protected]https://github.com/duke-git/lancet/issues/356 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 15 OCT 03:28Z
    EPSS moved — → 0%
    epss
  • 13 OCT 18:50Z
    Lancet through 2.3.9 SSRF Protection Bypass via netutil.IsInternalIP
    cvelistv5
  • 13 OCT 18:50Z
    Lancet through 2.3.9 SSRF Protection Bypass via netutil.IsInternalIP
    cvelistv5