CVE-2020-7770
CVSS v3
9.8
CRITICAL
EPSS Score
1.9 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
This affects the package json8 before 1.0.3. The function adds in the target object the property specified in the path, however it does not properly check the key being set, leading to a prototype pollution.
Technical details
- Published
- 2020-11-12
Frequently asked questions
What is CVE-2020-7770?
This affects the package json8 before 1.0.3. The function adds in the target object the property specified in the path, however it does not properly check the key being set, leading to a prototype pollution.
Is CVE-2020-7770 actively exploited?
Active exploitation of CVE-2020-7770 has not been confirmed. Its EPSS score was 1.9% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-7770?
CVE-2020-7770 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2020-7770 affecting your environment?
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