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CVE-2020-7766

30
FAUCET Score

CVE-2020-7766 is a critical prototype pollution vulnerability affecting all versions of the json-ptr package. When the 'set' operation is used with the 'force' flag enabled, improper key validation allows an attacker to inject arbitrary properties into the Object prototype. This flaw carries a CVSS score of 9.8 (Critical), indicating it can be exploited remotely with low complexity, leading to complete compromise of confidentiality, integrity, and availability. There is currently no public exploit code, active exploitation, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.0.0CPE matchmatch criteria
cpe:2.3:a:json-ptr_project:json-ptr:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.3HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.88%
Probability of exploitation in next 30 days
EPSS Percentile
77.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0188 is in the 66th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

npmpatch availablevia ghsa
Product: json-ptrFixed in: 2.1.0

Vendor Advisories (1)

npmGHSA-x5r6-x823-9848high

Arbitrary Code Execution in json-ptr

May 10, 2021

References

github.com / flitbit/json-ptr/blob/master/src/util.ts%23L174
Broken Link
snyk.io / vuln/SNYK-JAVA-ORGWEBJARSNPM-1038396
ExploitThird Party Advisory
snyk.io / vuln/SNYK-JS-JSONPTR-1016939
ExploitThird Party Advisory