{"cve":{"cve_id":"CVE-2025-69873","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00407,"epss_percentile":0.32338,"epss_as_of":"2026-06-23","description":"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 any API using ajv with $data: true for dynamic schema validation. This issue is also fixed in version 6.14.0.","published_at":"2026-02-11T00:00:00Z","last_modified_at":null,"cvss_v3_score":2.9,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L","cvss_v3_severity":"LOW","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-1333","CWE-400"],"nvd_references":["https://github.com/advisories/GHSA-2g4f-4pwh-qvx6","https://github.com/EthanKim88/ethan-cve-disclosures/blob/main/CVE-2025-69873-ajv-ReDoS.md","https://github.com/github/advisory-database/pull/6991","https://github.com/ajv-validator/ajv/pull/2588","https://github.com/ajv-validator/ajv/releases/tag/v6.14.0","https://github.com/ajv-validator/ajv/pull/2590"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-28T23:28:26.914075Z"},"effective_severity":"LOW","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"H","value_label":"High"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"L","value_label":"Low"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"ajv.js","vendor_name":"ajv.js","product_slug":"ajv","product_name":"ajv","version_start":"0","version_start_inclusive":true,"version_end":"6.14.0","version_end_inclusive":false,"cpe23_uri":"cve5:ajv.js:ajv:0:6.14.0"},{"vendor_slug":"ajv.js","vendor_name":"ajv.js","product_slug":"ajv","product_name":"ajv","version_start":"7.0.0","version_start_inclusive":true,"version_end":"8.17.2","version_end_inclusive":false,"cpe23_uri":"cve5:ajv.js:ajv:7.0.0:8.17.2"}],"exploit_refs":[],"news":[],"references":[{"url":"https://github.com/advisories/GHSA-2g4f-4pwh-qvx6","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"https://github.com/EthanKim88/ethan-cve-disclosures/blob/main/CVE-2025-69873-ajv-ReDoS.md","source_type":"MISC","tags":[]},{"url":"https://github.com/github/advisory-database/pull/6991","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/ajv-validator/ajv/pull/2588","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/ajv-validator/ajv/releases/tag/v6.14.0","source_type":"PATCH","tags":["patch"]},{"url":"https://github.com/ajv-validator/ajv/pull/2590","source_type":"PATCH","tags":["patch"]}],"timeline":[{"type":"published","at":"2026-02-11T00:00:00Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:49:31.027096Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:49:31.027096Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:49:31.027096Z","label":"CVSS score revised","source":"cvelistv5"}]}