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{"acknowledgement": "Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges 360\u653f\u4f01\u5b89\u5168\u6f0f\u6d1e\u7814\u7a76\u9662 in Tianfu Cup 2020 International Cybersecurity Contest as the original reporter.", "affected_release": [{"advisory": "RHSA-2020:5104", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "firefox-0:78.4.1-1.el6_10", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2020-11-12T00:00:00Z"}, {"advisory": "RHSA-2020:5164", "cpe": "cpe:/o:redhat:enterprise_linux:6", "impact": "important", "package": "thunderbird-0:78.4.3-1.el6_10", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2020-11-23T00:00:00Z"}, {"advisory": "RHSA-2020:5099", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "firefox-0:78.4.1-1.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-11-12T00:00:00Z"}, {"advisory": "RHSA-2020:5163", "cpe": "cpe:/o:redhat:enterprise_linux:7", "impact": "important", "package": "thunderbird-0:78.4.3-1.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-11-23T00:00:00Z"}, {"advisory": "RHSA-2020:5100", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "firefox-0:78.4.1-1.el8_3", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-11-12T00:00:00Z"}, {"advisory": "RHSA-2020:5146", "cpe": "cpe:/a:redhat:enterprise_linux:8", "impact": "important", "package": "thunderbird-0:78.4.3-1.el8_3", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-11-18T00:00:00Z"}, {"advisory": "RHSA-2020:5138", "cpe": "cpe:/a:redhat:rhel_e4s:8.0", "package": "firefox-0:78.4.1-1.el8_0", "product_name": "Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions", "release_date": "2020-11-17T00:00:00Z"}, {"advisory": "RHSA-2020:5167", "cpe": "cpe:/a:redhat:rhel_e4s:8.0", "package": "thunderbird-0:78.4.3-1.el8_0", "product_name": "Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions", "release_date": "2020-11-23T00:00:00Z"}, {"advisory": "RHSA-2020:5135", "cpe": "cpe:/a:redhat:rhel_eus:8.1", "package": "firefox-0:78.4.1-1.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2020-11-17T00:00:00Z"}, {"advisory": "RHSA-2020:5166", "cpe": "cpe:/a:redhat:rhel_eus:8.1", "package": "thunderbird-0:78.4.3-1.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2020-11-23T00:00:00Z"}, {"advisory": "RHSA-2020:5139", "cpe": "cpe:/a:redhat:rhel_eus:8.2", "package": "firefox-0:78.4.1-1.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Extended Update Support", "release_date": "2020-11-17T00:00:00Z"}, {"advisory": "RHSA-2020:5162", "cpe": "cpe:/a:redhat:rhel_eus:8.2", "package": "thunderbird-0:78.4.3-1.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Extended Update Support", "release_date": "2020-11-23T00:00:00Z"}], "bugzilla": {"description": "Mozilla: Write side effects in MCallGetProperty opcode not accounted for", "id": "1896306", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1896306"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-416", "details": ["In certain circumstances, the MCallGetProperty opcode can be emitted with unmet assumptions resulting in an exploitable use-after-free condition. This vulnerability affects Firefox < 82.0.3, Firefox ESR < 78.4.1, and Thunderbird < 78.4.2."], "name": "CVE-2020-26950", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Out of support scope", "package_name": "firefox", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Out of support scope", "package_name": "thunderbird", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2020-11-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-26950\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-26950\nhttps://www.mozilla.org/en-US/security/advisories/mfsa2020-49/#CVE-2020-26950"], "threat_severity": "Critical"}