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CVE-2026-109780

9.8 critical SSVC exploitation: none Deferred
NVD · CVE.org

Mitigation bypass in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 3

  1. CwesCWE-693NVD modified 2026-10-26 20:17
  2. CVSS9.8 (v3.1, CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)NVD modified 2026-10-26 20:17
  3. First seenunscoredNVD modified 2026-10-13 19:18

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 3