CVE-2020-7766: This affects all versions of package json-ptr

Q: How do I fix CVE-2020-7766?

json-ptr: upgrade to 2.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2020-7766 being exploited?

CVE-2020-7766 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-7766 affect?

CVE-2020-7766 affects json-ptr. Severity is high (CVSS 7.3). 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 propert

Q: How urgent is CVE-2020-7766?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.3REMOTEUPGRADE

CVE-2020-7766 is a high-severity flaw (CVSS 7.3) affecting json-ptr. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Weakness	CWE-1321
Published	2020-11-10
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: json-ptr project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-11-10 16:15 UTCPublished CVE record published
2026-06-17 03:25 UTCUpdated Record last modified

json-ptr project json-ptr UPGRADE

Affected: < 2.0.0

Fixed in: 2.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy json-ptr || rpm -q json-ptr || json-ptr --version

2. UPGRADE to 2.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade json-ptr

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade json-ptr

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-7766?

json-ptr: upgrade to 2.0.0. Exact commands for each OS are on this page.

Is CVE-2020-7766 being exploited?

CVE-2020-7766 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-7766 affect?

CVE-2020-7766 affects json-ptr. Severity is high (CVSS 7.3). 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 propert

How urgent is CVE-2020-7766?

Priority 55/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Software pages

GitHub vulnerabilities

Related CVEs

CVE-2021-23509 MEDIUM 5.6 UPGRADE This affects the package json-ptr before 3.0.0

References

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