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CVE-2026-8975

8.8 high SSVC exploitation: none Modified
NVD · CVE.org

Memory safety bugs present in Thunderbird 140.10 and Thunderbird 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Fix

Patch, vendor advisory and mitigation references on NVD 5

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 6

  1. CwesCWE-119, CWE-787NVD modified 2026-10-21 14:17
  2. References+24 references (now 30)NVD modified 2026-10-21 14:17
  3. Cpes+4 CPE criteria (now 4)NVD modified 2026-10-21 14:17
  4. StatusPublished → ModifiedNVD modified 2026-10-21 14:17
  5. CVSS8.8 (v3.1, CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)NVD modified 2026-10-21 14:17
  6. First seenunscored · mozillaNVD modified 2026-10-21 13:50

Affected (CPE criteria) 4

  • cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*
  • cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*
  • cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*

References 30