CVE-2020-7766

Name: CVE-2020-7766
Creator: NVD / NIST
Published: 2020-11-10T16:15:14.963+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.88%

Last modified Jun 17, 2026

CVE-2020-7766 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. This affects all versions of package json-ptr. The issue occurs in the set operation (https://flitbit.github.io/json-ptr/classes/_src_pointer_.jsonpointer.htmlset) when the force flag is set to true. EPSS estimates a 1.88% chance of exploitation in the next 30 days.

Description

This affects all versions of package json-ptr. The issue occurs in the set operation (https://flitbit.github.io/json-ptr/classes/_src_pointer_.jsonpointer.htmlset) when the force flag is set to true. The function recursively set the property in the target object, however it does not properly check the key being set, leading to a prototype pollution.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.88%

76.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1321

Affected Software

Vendor	Product	Versions
Json-Ptr Project	Json-Ptr	< 2.0.0

References

https://github.com/flitbit/json-ptr/blob/master/src/util.ts%23L174Broken Link
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1038396Exploit, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-JSONPTR-1016939Exploit, Third Party Advisory
https://github.com/flitbit/json-ptr/blob/master/src/util.ts%23L174Broken Link
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1038396Exploit, Third Party Advisory
https://snyk.io/vuln/SNYK-JS-JSONPTR-1016939Exploit, Third Party Advisory

Timeline

Published: Nov 10, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-7766?

How severe is CVE-2020-7766?

CVE-2020-7766 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.88% probability of exploitation in the next 30 days.

How do I fix CVE-2020-7766?

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.

Are you affected by CVE-2020-7766?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST