CVE-2026-12330

MEDIUM EPSS 6.0%
Published Jun 16, 20261w ago · Modified Jun 17, 20261w ago
5.4 CVSS 3.1
Medium
Find Similar
Published Jun 16, 2026 1w ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
5.4
Exploitability
2.8
Impact
2.5
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Low
Integrity Low
Availability None

Threat Intelligence

EPSS Exploit Probability
6.0% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer Memory Safety

Affected Products 3

VendorProductVersionRange
mozillafirefox* <115.37.0
mozillafirefox*≥140.0  –  <140.12.0
mozillathunderbird*≥140.0  –  <140.12.0

References 4

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=2029326
    Permissions Required
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-58/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-59/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-61/
    Vendor Advisory

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.