CVE-2026-12298

high

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.

References

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

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

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

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

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12298.json

https://bugzilla.redhat.com/show_bug.cgi?id=2489248

https://bugzilla.mozilla.org/show_bug.cgi?id=2041981

https://access.redhat.com/security/cve/CVE-2026-12298

https://access.redhat.com/errata/RHSA-2026:37391

https://access.redhat.com/errata/RHSA-2026:37210

https://access.redhat.com/errata/RHSA-2026:36103

https://access.redhat.com/errata/RHSA-2026:36102

https://access.redhat.com/errata/RHSA-2026:36101

https://access.redhat.com/errata/RHSA-2026:36100

https://access.redhat.com/errata/RHSA-2026:33445

https://access.redhat.com/errata/RHSA-2026:30846

https://access.redhat.com/errata/RHSA-2026:29940

https://access.redhat.com/errata/RHSA-2026:27734

https://access.redhat.com/errata/RHSA-2026:27733

https://access.redhat.com/errata/RHSA-2026:27717

Details

Source: Mitre, NVD

Published: 2026-06-16

Updated: 2026-07-10

Risk Information

CVSS v2

Base Score: 7.6

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

Severity: High

CVSS v3

Base Score: 7.5

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

Severity: High

EPSS

EPSS: 0.00204