CVE-2020-20136
CVSS v3
9.8
CRITICAL
EPSS Score
1.5 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2020-12-14
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.
Is CVE-2020-20136 actively exploited?
Active exploitation of CVE-2020-20136 has not been confirmed. Its EPSS score was 1.5% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-20136?
CVE-2020-20136 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2020-20136 affecting your environment?
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