CVE-2026-12330

Published: Jun 16, 2026Modified: Jun 17, 2026

5.4

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Exploitability: 2.8 / Impact: 2.5

Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Description

Incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 140.12, Firefox ESR 115.37, and Thunderbird 140.12.

Affected (3)

Products: Mozilla: Firefox, Thunderbird

Mozilla

2 products

Firefox

Thunderbird

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Mozilla Firefox	Before 115.37.0
Mozilla Firefox	From 140.0 to 140.12.0
Mozilla Thunderbird	From 140.0 to 140.12.0

Related CWEs

CWE-119

Improper Restriction of Operations within the Bounds of a Memory Buffer

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

References (4)

https://bugzilla.mozilla.org/show_bug.cgi?id=2029326

Source: security@mozilla.org

Permissions Required

https://www.mozilla.org/security/advisories/mfsa2026-58/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2026-59/

Source: security@mozilla.org

Vendor Advisory

https://www.mozilla.org/security/advisories/mfsa2026-61/

Source: security@mozilla.org

Vendor Advisory

Timeline

No history available yet.