CVEvulnerability

CVE-2026-84142

9.8 CRITICAL Published 2026-09-01 Modified 2026-09-03 Official page ↗
Status
Modified
Published
2026-09-01
Last modified
2026-09-03
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-119, CWE-200

Description

Internally found bugs present in Thunderbird 154. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155 and Thunderbird 155.

Affected configurations

• mozilla firefox (< 155.0.0) • mozilla thunderbird (< 155.0)

Related

Weakness · CWE (2)

  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor weakness

References