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CVE-2026-110240: Server-Side Request Forgery (SSRF) in duke-git lancet

0
Medium
VulnerabilityCVE-2026-110240cvecve-2026-110240
Published: 10/13/2026 (10/13/2026, 18:50:20 UTC)
Source: CVE Database V5
Vendor/Project: duke-git
Product: lancet

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.

CVSS v4.0

Score 6.3medium

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
None
Vuln. Integrity
None
Vuln. Availability
None
Subsq. Confidentiality
Low
Subsq. Integrity
Low
Subsq. Availability
None
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 software

duke-git

lancet

Affected versions
>=2.1.2 <=2.3.9

duke-git

lancet

Affected versions
>=1.3.1 <=1.4.6
GitHub Actionsmore threats →cve
lancet
pkg:github/lancet
Affected versions
>=2.1.2 <=2.3.9>=1.3.1 <=1.4.6

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

Technical Details

Data Version
5.2
Assigner Short Name
VulnCheck
Date Reserved
2026-10-13T18:00:16.590Z
Cvss Version
4.0
State
PUBLISHED

Threat ID: 6ace80b72cdf04f6569c00cc

Added to database: 10/13/2026, 19:04:23 UTC

Last updated: 10/13/2026, 19:04:23 UTC

Views: 1

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