{"id":"CVE-2026-0881","title":"Sandbox escape in the Messaging System component","summary":"Sandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.","severity":"critical","cvss":10,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-284","CWE-693"],"vendor":"mozilla","product":"firefox","affected":["firefox < 147.0","thunderbird < 147.0"],"patched":["firefox 147.0","thunderbird 147.0"],"published":"2026-01-13","updated":"2026-06-30","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-0881","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2005845","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-01/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-04/","label":"security@mozilla.org"},{"url":"https://access.redhat.com/security/cve/CVE-2026-0881","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2428970","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0881.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}],"tags":["nvd"],"epss":0.00356,"epssPercentile":0.2945,"ingestedAt":"2026-06-30T13:26:50.474Z","slug":"CVE-2026-0881","body":"## Overview\n\nSandbox escape in the Messaging System component. This vulnerability was fixed in Firefox 147 and Thunderbird 147.\n\n## Affected\n\n- `firefox < 147.0`\n- `thunderbird < 147.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 147.0`\n- `thunderbird 147.0`","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":55,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}