CVE-2026-12328

Description

Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, 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/mfsa2026-59/

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-2026-12328.json

https://bugzilla.redhat.com/show_bug.cgi?id=2489218

https://bugzilla.mozilla.org/buglist.cgi?bug_id=2029402%2C2038477%2C2039726%2C2041373%2C2042268%2C2042451%2C2042782%2C2042858%2C2042929%2C2042965%2C2043213

https://access.redhat.com/security/cve/CVE-2026-12328

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

Risk Information

CVSS v2

CVSS v3

EPSS