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ajv vulnerabilities

Vulnerabilities published for ajv in the last 30 days: 0. Listed in the KEV catalogue: 0.

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Vulnerabilities: 2

  1. CVE-2025-69873

    Low · CVSS 2.9EPSS 0.55%Fix available

    CVE-2025-69873

    ajv (Another JSON Schema Validator) before 8.18.0 is vulnerable to Regular Expression Denial of Service (ReDoS) when the $data option is enabled. The pattern keyword accepts runtime data via JSON Pointer syntax ($data reference), which is passed directly to the JavaScript RegExp() constructor without validation. An attacker can inject a malicious regex pattern (e.g., "^(a|a)*$") combined with crafted input to cause catastrophic backtracking. A 31-character payload causes approximately 44 seconds of CPU blocking, with each additional character doubling execution time. This enables complete denial of service with a single HTTP request against a

    ajv ajvNode.js
    • Update to 6.14.0
    • Update to 8.18.0
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

  2. CVE-2020-15366

    Medium · CVSS 5.6EPSS 2.31%Fix available

    CVE-2020-15366

    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.)

    ajvNode.js
    • Update to 6.12.3
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

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