CVE-2026-12298
Memory safety bug fixed in Firefox 152
CVSS Score
5.4
EPSS Score
0.3%
EPSS Percentile
22th
Memory safety bug fixed in Firefox 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
| Vendor | mozilla |
| Product | firefox |
| Ecosystems | |
| Industries | Technology |
| Published | Jun 16, 2026 |
| Last Updated | Jul 15, 2026 |
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Affected Versions
Mozilla / Firefox
All versions affected Mozilla / Thunderbird
All versions affected References
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=2041981 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-57/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-58/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-60/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-61/ access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-12298 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2489248 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12298.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:38506 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36100 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:38751 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:27733 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:30846 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:27717 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:33445 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36102 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:39428 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:37210 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:39141 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36103 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:39142 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36101 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:39706 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:39011 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:38753 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:37391 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:38750 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:27734 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:29940
Credits
Haruka Yamazaki