ajv (npm)

The fastest JSON schema Validator. Supports JSON Schema draft-04/06/07/2019-09/2020-12 and JSON Type Definition (RFC8927)

Advisories

Latest version

8.20.0

Released Apr 24, 2026

License

MIT

OpenSSF Scorecard

4.8 / 10

How to fix

Upgrading to 8.18.0 or later clears every advisory below that has a fix.

Upgrade commands

npm

npm install ajv@8.20.0

yarn

yarn add ajv@8.20.0

pnpm

pnpm add ajv@8.20.0

Known vulnerabilities

Advisory	Severity	Affected	Fixed in
GHSA-2g4f-4pwh-qvx6 ajv has ReDoS when using `$data` option	Medium EPSS 0.55%	`>= 7.0.0-alpha.0, < 8.18.0`	`8.18.0`
GHSA-2g4f-4pwh-qvx6 ajv has ReDoS when using `$data` option	Medium EPSS 0.55%	`< 6.14.0`	`6.14.0`
GHSA-2g4f-4pwh-qvx6 ajv has ReDoS when using `$data` option	Medium EPSS 0.55%	`>= 7.0.0-alpha.0, < 8.18.0`	`8.18.0`
GHSA-2g4f-4pwh-qvx6 ajv has ReDoS when using `$data` option	Medium EPSS 0.55%	`< 6.14.0`	`6.14.0`
GHSA-v88g-cgmw-v5xw Prototype Pollution in Ajv	Medium EPSS 2.31%	`< 6.12.3`	`6.12.3`

Source: git+https://github.com/ajv-validator/ajv.git

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