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TI-2020-13772 Aliases CVE-2020-20136GHSA-ww7r-278h-48mh

QuantConnect Lean versions from 2.3.0.0 to 2.4.0.1 are affected by an insecure…

Priority MEDIUM 45CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-502.

Summary

QuantConnect Lean versions from 2.3.0.0 to 2.4.0.1 are affected by an insecure deserialization vulnerability due to insecure configuration of TypeNameHandling property in Json.NET library.

Why it matters now

EPSS 0.01537 75th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
—QuantConnect.Common (NuGet)2.3.0.0 – 2.4.0.1—No fix listedGHSA-ww7r-278h-48mh
  • — Vendor— Affected all versions Fixed in — No fix listed CNA
  • QuantConnect.Common (NuGet) Vendor— Affected 2.3.0.0 – 2.4.0.1 Fixed in — No fix listed GHSA-ww7r-278h-48mh

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:quantconnect:lean:*:*:*:*:*:*:*:*2.3.0.0 – 2.4.0.1VulnerableQuantconnect
  • cpe:2.3:a:quantconnect:lean:*:*:*:*:*:*:*:* Versions 2.3.0.0 – 2.4.0.1 Vulnerable ·Quantconnect

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-20136
  2. 2026-10-03 Alias added: GHSA-ww7r-278h-48mh

References

Exploit 1

Advisory 1

Other 1

Sources

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