Lancet through 2.3.9 SSRF Protection Bypass via netutil.IsInternalIP
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.
CVE-2026-110240
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-110240
lancet
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
lancet
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://github.com/duke-git/lancet",
"vendor": "duke-git",
"product": "lancet",
"versions": [
{
"status": "affected",
"version": "2.1.2",
"versionType": "semver",
"lessThanOrEqual": "2.3.9"
}
],
"packageURL": "pkg:golang/github.com/duke-git/lancet/v2",
"defaultStatus": "unaffected"
},
{
"repo": "https://github.com/duke-git/lancet",
"vendor": "duke-git",
"product": "lancet",
"versions": [
{
"status": "affected",
"version": "1.3.1",
"versionType": "semver",
"lessThanOrEqual": "1.4.6"
}
],
"packageURL": "pkg:golang/github.com/duke-git/lancet",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-110240
Source reference:
/cveMetadata/cveId
Publisher severity
medium
Source reference: /containers/cna/metrics
- Event
- #20715 · Revision 1
- Added to Heist Feed
- Publisher date