CVE-2026-12300

MEDIUM5.3JSON export Create alert

Description

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

CVSS breakdown

CVSS 3.1

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

None

Affected products

Mozilla / Firefox152 – *
Mozilla / Thunderbird152 – *

References

MISChttps://bugzilla.mozilla.org/show_bug.cgi?id=1704114
VENDOR_ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2026-57/
VENDOR_ADVISORYhttps://www.mozilla.org/security/advisories/mfsa2026-60/