CVE-2026-12300

medium

Description

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

References

https://www.mozilla.org/security/advisories/mfsa2026-60/

https://www.mozilla.org/security/advisories/mfsa2026-57/

https://bugzilla.mozilla.org/show_bug.cgi?id=1704114

Details

Source: Mitre, NVD

Published: 2026-06-16

Updated: 2026-06-18

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 5.3

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

Severity: Medium

EPSS

EPSS: 0.00269