CVEvulnerability

CVE-2026-12294

9.6 CRITICAL Published 2026-06-16 Modified 2026-10-26 Official page ↗
Status
Modified
Published
2026-06-16
Last modified
2026-10-26
Assigner
[email protected]
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
9.6 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CVSS 3.1 (0b0ca135-0b70-47e7-9f44-1890c2a1c46c)
7.5 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weaknesses
CWE-266, CWE-693

Description

Sandbox escape in the DOM: Workers component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.

Affected configurations

• mozilla firefox (< 115.37.0) • mozilla firefox (< 152.0.0) • mozilla firefox (>= 128.0 < 140.12.0) • mozilla thunderbird (< 140.12.0) • mozilla thunderbird (< 152.0.0)

Related

Weakness · CWE (2)

  • CWE-266 Incorrect Privilege Assignment weakness
  • CWE-693 Protection Mechanism Failure weakness

References