CVE-2026-12307

MEDIUM EPSS 17.4%
Published Jun 16, 20262w ago · Modified Jun 18, 20261w ago
5.3 CVSS 3.1
Medium
Find Similar
Published Jun 16, 2026 2w ago
Last Modified Jun 18, 2026 1w ago

Description

Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.

CVSS Details

Base Score
5.3
Exploitability
3.9
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Low
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
17.4% 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 4

VendorProductVersionRange
mozillafirefox* <140.12.0
mozillafirefox* <152.0.0
mozillathunderbird* <140.12.0
mozillathunderbird* <152.0.0

References 5

  • bugzilla.mozilla.org https://bugzilla.mozilla.org/show_bug.cgi?id=2038133
    Permissions Required
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-57/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-58/
    Vendor Advisory
  • mozilla.org https://www.mozilla.org/security/advisories/mfsa2026-60/
    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.