CVE-2026-0879
Sandbox escape due to incorrect boundary conditions in the Graphics component
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
0th
Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
| Vendor | mozilla |
| Product | firefox |
| Ecosystems | |
| Industries | Technology |
| Published | Jan 13, 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=2004602 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-01/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-02/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-03/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-04/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2026-05/ access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-0879 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2428973 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0879.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2231 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2271 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2286 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:0667 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2220 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2074 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:1471 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2073 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:1461 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2070 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:1487 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2069 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:1462 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2047 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:1413 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2044 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:1415 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2041 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:1414 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:2043 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:1320 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:0694 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:0924
Credits
Oskar L