{"id":"CVE-2025-49709","title":"Certain canvas operations could have lead to memory corruption","summary":"Certain canvas operations could have lead to memory corruption. This vulnerability was fixed in Firefox 139.0.4.","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-787"],"vendor":"mozilla","product":"firefox","affected":["firefox < 139.0.4"],"patched":["firefox 139.0.4"],"published":"2025-06-11","updated":"2026-09-30","sourceUpdated":"2026-09-30T19:10:01.007","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-49709","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1966083","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-47/","label":"security@mozilla.org"}],"tags":["nvd"],"epss":0.00662,"epssPercentile":0.49771,"ingestedAt":"2026-09-30T19:21:07.235Z","slug":"CVE-2025-49709","body":"## Overview\n\nCertain canvas operations could have lead to memory corruption. This vulnerability was fixed in Firefox 139.0.4.\n\n## Affected\n\n- `firefox < 139.0.4`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 139.0.4`","depth":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}