{"id":"UBUNTU-CVE-2020-26966","details":"Searching for a single word from the address bar caused an mDNS request to be sent on the local network searching for a hostname consisting of that string; resulting in an information leak. *Note: This issue only affected Windows operating systems. Other operating systems are unaffected.*. This vulnerability affects Firefox \u003c 83, Firefox ESR \u003c 78.5, and Thunderbird \u003c 78.5.","modified":"2025-10-24T04:48:49Z","published":"2020-12-09T01:15:00Z","upstream":["CVE-2020-26966"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-26966"},{"type":"REPORT","url":"https://www.mozilla.org/en-US/security/advisories/mfsa2020-50/#CVE-2020-26966"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-26966"}],"affected":[{"package":{"name":"mozjs52","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mozjs52@52.9.1-0ubuntu0.18.04.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["52.3.1-0ubuntu3","52.3.1-7fakesync1","52.8.1-0ubuntu0.18.04.1","52.9.1-0ubuntu0.18.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"52.9.1-0ubuntu0.18.04.1","binary_name":"libmozjs-52-0"},{"binary_version":"52.9.1-0ubuntu0.18.04.1","binary_name":"libmozjs-52-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-26966.json"}},{"package":{"name":"mozjs38","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/mozjs38@38.8.0~repack1-0ubuntu4?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["38.8.0~repack1-0ubuntu1","38.8.0~repack1-0ubuntu3","38.8.0~repack1-0ubuntu4"],"ecosystem_specific":{"binaries":[{"binary_version":"38.8.0~repack1-0ubuntu4","binary_name":"libmozjs-38-0"},{"binary_version":"38.8.0~repack1-0ubuntu4","binary_name":"libmozjs-38-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-26966.json"}},{"package":{"name":"mozjs68","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/mozjs68@68.6.0-1ubuntu1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["68.5.0-1~fakesync","68.5.0-2~fakesync","68.6.0-1","68.6.0-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"68.6.0-1ubuntu1","binary_name":"libmozjs-68-0"},{"binary_version":"68.6.0-1ubuntu1","binary_name":"libmozjs-68-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-26966.json"}},{"package":{"name":"mozjs52","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/mozjs52@52.9.1-1ubuntu3?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["52.9.1-1build1","52.9.1-1ubuntu3"],"ecosystem_specific":{"binaries":[{"binary_version":"52.9.1-1ubuntu3","binary_name":"libmozjs-52-0"},{"binary_version":"52.9.1-1ubuntu3","binary_name":"libmozjs-52-dev"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-26966.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"},{"type":"Ubuntu","score":"low"}]}