CVE-2026-110240Lancet through 2.3.9 SSRF Protection Bypass via netutil.IsInternalIP
Updated under an hour ago ()
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It affects duke-git lancet. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 4.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
- Weakness (CWE)
- CWE-918
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 13, 2026
- First seen by InfoSec Signals
- Oct 13, 2026
Affected products
duke-git lancet duke_git:lancet (from the name) | from 2.1.2 through 2.3.9 | CNA record |
References
- https://github.com/duke-git/lancet/issues/356issue-tracking, technical-description
- https://github.com/duke-git/lancet/pull/357patch, issue-tracking
- https://github.com/duke-git/lancet/commit/835111c832939a85416d686a1e99d5fe7060c9b4patch
- https://github.com/duke-git/lancet/blob/v2.3.9/netutil/net.go#L192-L205technical-description
- https://github.com/duke-git/lancet/blob/v1.4.6/netutil/net.go#L158-L170technical-description
- https://github.com/duke-git/lancetproduct
- https://www.vulncheck.com/advisories/lancet-through-2.3.9-ssrf-protection-bypass-via-netutil-isinternalipthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.