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CVE-2026-109708

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

Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, Thunderbird 153.5, and Firefox ESR 115.44.

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 5

  1. References+1 references (now 6)NVD modified 2026-10-27 14:16
  2. Description
    Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, Thunderbird 153.5, and Firefox ESR 115.44.
    NVD modified 2026-10-27 14:16
  3. CwesCWE-119NVD modified 2026-10-15 20:17
  4. CVSS9.6 (v3.1, CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H)NVD modified 2026-10-15 20:17
  5. First seenunscoredNVD modified 2026-10-13 19:18

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 6