CVE-2020-20136
CRITICALCVSS 9.8/10EPSS 1.52%
Last modified
CVE-2020-20136 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 1.52% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Quantconnect | Lean | >= 2.3.0.0, <= 2.4.0.1 |
References
- https://github.com/QuantConnect/Lean/issues/3537Exploit, Third Party Advisory
- https://github.com/QuantConnect/Lean/issues/3537Exploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2020-20136?
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.
How severe is CVE-2020-20136?
CVE-2020-20136 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.52% probability of exploitation in the next 30 days.
How do I fix CVE-2020-20136?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2020-20136?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST