CVE-2020-15366

Name: CVE-2020-15366
Creator: NVD / NIST
Published: 2020-07-15T20:15:13.38+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.6/10EPSS 2.31%

Last modified Jun 17, 2026

CVE-2020-15366 is a medium-severity vulnerability rated 5.6/10 on the CVSS scale. An issue was discovered in ajv.validate() in Ajv (aka Another JSON Schema Validator) 6.12.2. A carefully crafted JSON schema could be provided that allows execution of other code by prototype pollution. EPSS estimates a 2.31% chance of exploitation in the next 30 days.

Description

An issue was discovered in ajv.validate() in Ajv (aka Another JSON Schema Validator) 6.12.2. A carefully crafted JSON schema could be provided that allows execution of other code by prototype pollution. (While untrusted schemas are recommended against, the worst case of an untrusted schema should be a denial of service, not execution of code.)

Metrics

CVSS 3.1

5.6/10

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

EPSS Probability

2.31%

81.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-1321

Affected Software

Vendor	Product	Versions
Ajv.Js	Ajv	6.12.2

References

https://github.com/ajv-validator/ajv/releases/tag/v6.12.3Release Notes, Third Party Advisory
https://github.com/ajv-validator/ajv/tagsThird Party Advisory
https://hackerone.com/bugs?subject=user&report_id=894259Permissions Required
https://security.netapp.com/advisory/ntap-20240621-0007/
https://github.com/ajv-validator/ajv/releases/tag/v6.12.3Release Notes, Third Party Advisory
https://github.com/ajv-validator/ajv/tagsThird Party Advisory
https://hackerone.com/bugs?subject=user&report_id=894259Permissions Required
https://security.netapp.com/advisory/ntap-20240621-0007/

Timeline

Published: Jul 15, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-15366?

How severe is CVE-2020-15366?

CVE-2020-15366 has a CVSS score of 5.6/10 (MEDIUM severity). The EPSS model estimates a 2.31% probability of exploitation in the next 30 days.

How do I fix CVE-2020-15366?

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-2020-15366?

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

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Source: NVD / NIST