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TI-2026-73456 Aliases CVE-2026-110240GHSA-q6h5-5jp8-6c7q

Server-side request forgery protection bypass in Lancet

Priority MEDIUM 61CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
None · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

duke-git Lancet from 2.1.2 through 2.3.9 and from 1.3.1 through 1.4.6 contains an SSRF protection bypass in netutil.IsInternalIP (CWE-918). The function classifies IPv6 private, link-local, CGNAT and transition addresses as external. A remote attacker without privileges can supply hostnames that resolve to these address forms, including NAT64, 6to4 or Teredo addresses embedding internal IPv4, to reach internal services or cloud metadata endpoints.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0033 26th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
duke-gitlancet2.1.2 – 2.3.9—No fix listedCNA
duke-gitlancet1.3.1 – 1.4.6—No fix listedCNA
  • lancet Vendorduke-git Affected 2.1.2 – 2.3.9 Fixed in — No fix listed CNA
  • lancet Vendorduke-git Affected 1.3.1 – 1.4.6 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for lancet.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-13 Threatist record created from CVE-2026-110240
  2. 2026-10-13 Alias added: GHSA-q6h5-5jp8-6c7q
  3. 2026-11-06 Affected versions changed · Red Hat
  4. 2026-11-06 CVSS score added · Red Hat

References

Patch 2

Other 4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences