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Vulnerability	Summary	Fixed by
VCID-1znw-5dwm-7ydy Aliases: CVE-2025-69873 GHSA-2g4f-4pwh-qvx6	ajv has ReDoS when using `$data` option ajv (Another JSON Schema Validator) through version 8.17.1 is vulnerable to Regular Expression Denial of Service (ReDoS) when the `$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 any API using ajv with `$data`: true for dynamic schema validation.	6.14.0 Affected by 0 other vulnerabilities. 7.0.0-alpha.0 Affected by 1 other vulnerability. This version is affected by these other vulnerabilities: {{ fixed_by_vuln.vulnerability_id }} 8.18.0 Affected by 0 other vulnerabilities.

Vulnerability

Summary

Fixed by

VCID-1znw-5dwm-7ydy
Aliases:
CVE-2025-69873
GHSA-2g4f-4pwh-qvx6

ajv has ReDoS when using `$data` option ajv (Another JSON Schema Validator) through version 8.17.1 is vulnerable to Regular Expression Denial of Service (ReDoS) when the `$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 any API using ajv with `$data`: true for dynamic schema validation.

6.14.0
Affected by 0 other vulnerabilities.

7.0.0-alpha.0
Affected by 1 other vulnerability.

8.18.0
Affected by 0 other vulnerabilities.

Vulnerability	Summary	Aliases
This package is not known to fix vulnerabilities.

Vulnerability

Summary

Aliases

This package is not known to fix vulnerabilities.

Date	Actor	Action	Vulnerability	Source	VulnerableCode Version
2026-04-17T00:17:24.611481+00:00	GitLab Importer	Affected by	VCID-1znw-5dwm-7ydy	https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/ajv/CVE-2025-69873.yml	38.4.0
2026-04-16T03:44:58.495825+00:00	GHSA Importer	Affected by	VCID-1znw-5dwm-7ydy	https://github.com/advisories/GHSA-2g4f-4pwh-qvx6	38.4.0
2026-04-12T01:41:38.389396+00:00	GitLab Importer	Affected by	VCID-1znw-5dwm-7ydy	https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/ajv/CVE-2025-69873.yml	38.3.0
2026-04-11T15:14:18.326957+00:00	GHSA Importer	Affected by	VCID-1znw-5dwm-7ydy	https://github.com/advisories/GHSA-2g4f-4pwh-qvx6	38.3.0
2026-04-03T01:50:32.541575+00:00	GitLab Importer	Affected by	VCID-1znw-5dwm-7ydy	https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/ajv/CVE-2025-69873.yml	38.1.0
2026-04-02T15:52:53.481890+00:00	GHSA Importer	Affected by	VCID-1znw-5dwm-7ydy	https://github.com/advisories/GHSA-2g4f-4pwh-qvx6	38.1.0