{"id":"CVE-2026-109779","title":"Race condition in the Networking: DNS component","summary":"Race condition in the Networking: DNS component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.","severity":"medium","cvss":4.2,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N","cwe":["CWE-362"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T19:18:42.413","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-109779","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2072048","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-109/","label":"security@mozilla.org"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-13T13:27:04.018Z","vendor":"Mozilla","product":"Firefox","affected":["Firefox","Thunderbird"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-13T14:53:48.294735Z"},"epss":0.00141,"epssPercentile":0.0337,"slug":"CVE-2026-109779","body":"## Overview\n\nRace condition in the Networking: DNS component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":23,"depthScoreParts":{"impact":23.1,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":219793,"id":"CVE-2026-109779","ts":1791905700420,"field":"cvss","old":null,"new":"4.2"},{"seq":219792,"id":"CVE-2026-109779","ts":1791905700420,"field":"severity","old":"none","new":"medium"}]}