CVE-2026-109745

CRITICALCVSS 9.6

Description

Sandbox escape due to uninitialized memory in the DOM: Web Serial component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

Timeline

Published:October 13th, 2026 1:17 PM

Last modified:October 19th, 2026 1:16 PM

CVSS Scoring

CVSS v3: 9.6 (CRITICAL)

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Weaknesses (CWE)

CWE-908

References & Reports

Advisories, patches, and third-party reports

https://bugzilla.mozilla.org/show_bug.cgi?id=2061784
https://www.mozilla.org/security/advisories/mfsa2026-106/
https://www.mozilla.org/security/advisories/mfsa2026-108/
https://www.mozilla.org/security/advisories/mfsa2026-109/
https://www.mozilla.org/security/advisories/mfsa2026-110/

Source: NIST NVD · Data may lag official sources by up to one minute