CVE-2026-110240: duke-git lancet

Lancet through 2.3.9 SSRF Protection Bypass via netutil.IsInternalIP

CVSS 6.3 MediumEPSS 0.0033 · 26th percentile

Published by the CVE Program (CNA: VulnCheck) at 13 Oct 2026, 18:50 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
duke-git	lancet pkg:golang/github.com/duke-git/lancet/v2	affected 2.1.2 to 2.3.9, inclusive semver Other versions: unaffected
duke-git	lancet pkg:golang/github.com/duke-git/lancet	affected 1.3.1 to 1.4.6, inclusive semver Other versions: unaffected

Identifiers

CVE-2026-110240

CNA

VulnCheck

Weakness (CWE)

CWE-918

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.3	Medium	4.0	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	CNA (VulnCheck)Used for this record
4.8	Medium	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N	CNA (VulnCheck)

CISA KEV Not listed.
EPSS 0.0033, the 26th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 13 Oct 2026. New records show when each source confirmed them.

Sources

References from the CNA

github.com/duke-git/lancet/issues/356 issue-trackingtechnical-description
github.com/duke-git/lancet/pull/357 patchissue-tracking
github.com/duke-git/lancet/commit/835111c832939a85416d686a1e99d5fe7060c9b4 patch
github.com/duke-git/lancet/blob/v2.3.9/netutil/net.go#L192-L205 technical-description
github.com/duke-git/lancet/blob/v1.4.6/netutil/net.go#L158-L170 technical-description
github.com/duke-git/lancet product
www.vulncheck.com/advisories/lancet-through-2.3.9-ssrf-protection-bypass-via-netutil-isinternalip third-party-advisory

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.