CVE-2026-0880

Severity CVSS v4.0:

Pending analysis

Type:

CWE-190 Integer Overflow or Wraparound

Publication date:

13/01/2026

Last modified:

13/04/2026

Description

Sandbox escape due to integer overflow in the Graphics component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.80 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): Required
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

8.80

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:mozilla:firefox:::::esr:::*		115.32.0 (excluding)
cpe:2.3:a:mozilla:firefox:::::-:::*		147.0 (excluding)
cpe:2.3:a:mozilla:firefox:::::esr:::*	128.0 (including)	140.7.0 (excluding)
cpe:2.3:a:mozilla:thunderbird:::::esr:::*		140.7.0 (excluding)
cpe:2.3:a:mozilla:thunderbird:::::-:::*		147.0 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2026-0880

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools