Prototype Pollution in Ajv
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.)
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | ajv | < 6.12.3 | 6.12.3 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-15366
- https://github.com/ajv-validator/ajv/commit/65b2f7d76b190ac63a0d4e9154c712d7aa37049f
- https://github.com/ajv-validator/ajv
- https://github.com/ajv-validator/ajv/releases/tag/v6.12.3
- https://github.com/ajv-validator/ajv/tags
- https://hackerone.com/bugs?subject=user&report_id=894259
- https://security.netapp.com/advisory/ntap-20240621-0007
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L- Weakness (CWE)
CWE-1321, CWE-915- Platform
- npm
- Package
ajv- Disclosed
- 10.02.2022
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-v88g-cgmw-v5xw - CC BY 4.0
Vulnerability history: ajv
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 02.2022 02.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 2
Disclosures per year
- 2022: 1
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 1
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Prototype Pollution in Ajv this entry
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