{"uuid": "898ffb64-f5d1-41cf-bf0f-216005bea7dc", "vulnerability": {"vulnId": "CVE-2020-6820", "altId": []}, "gcve": {"origin_uuid": "405284c2-e461-4670-8979-7fd2c9755a60", "object_uuid": "898ffb64-f5d1-41cf-bf0f-216005bea7dc"}, "status": {"exploited": true, "status_reason": "confirmed", "status_updated_at": "2021-11-03T00:00:00+00:00"}, "characteristics": {}, "timestamps": {"asserted_at": "2021-11-03T00:00:00Z", "recorded_at": "2026-02-02T13:24:01Z", "first_seen_at": "2021-11-03T00:00:00Z"}, "scope": {"notes": "KEV entry: Mozilla Firefox And Thunderbird Use-After-Free Vulnerability | Affected: Mozilla / Firefox and Thunderbird | Description: Mozilla Firefox and Thunderbird contain a race condition vulnerability when handling a ReadableStream under certain conditions. The race condition creates a use-after-free vulnerability, causing unspecified impacts. | Required action: Apply updates per vendor instructions. | Due date: 2022-05-03 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://nvd.nist.gov/vuln/detail/CVE-2020-6820"}, "evidence": [{"type": "vendor_report", "source": "cisa-kev", "signal": "successful_exploitation", "confidence": 0.8, "details": {"cwes": ["CWE-362"], "feed": "CISA Known Exploited Vulnerabilities Catalog", "product": "Firefox and Thunderbird", "due_date": "2022-05-03", "date_added": "2021-11-03", "vendorProject": "Mozilla", "vulnerabilityName": "Mozilla Firefox And Thunderbird Use-After-Free Vulnerability", "knownRansomwareCampaignUse": "Unknown"}}], "references": [{"id": "CVE-2020-6820", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-6820"}]}