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VULNERABILITIES

CVE-2026-110240 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:4.8 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/duke-git/lancet/issues/356 CISA-ADP
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]

see all 8 references

Weakness Enumeration

CWE-IDCWE NameSource
CWE-918Server-Side Request Forgery (SSRF)[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-110240
NVD Published Date:
Oct 13, 2026
NVD Last Modified:
Oct 13, 2026
Source:
[email protected]
CVE-2026-110240 Details - Not Deferred