CVE-2026-0879
Sandbox escape due to incorrect boundary conditions in the Graphics component
- State
- Published
- Severity
- 9.8 Critical
- Published
- Jan 13, 2026
- Updated
- Jul 15, 2026
- Reserved
- Jan 13, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H | redhat-SADP |
Weaknesses
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
Affected Products
| Product | Versions |
|---|---|
FirefoxMozilla |
|
ThunderbirdMozilla |
|
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2004602
- https://www.mozilla.org/security/advisories/mfsa2026-01/
- https://www.mozilla.org/security/advisories/mfsa2026-02/
- https://www.mozilla.org/security/advisories/mfsa2026-03/
- https://www.mozilla.org/security/advisories/mfsa2026-04/
- https://www.mozilla.org/security/advisories/mfsa2026-05/
- https://access.redhat.com/security/cve/CVE-2026-0879vdb-entry
- RHBZ#2428973issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-0879.json
- https://access.redhat.com/errata/RHSA-2026:2231vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2271vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2286vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:0667vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2220vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2074vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:1471vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2073vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:1461vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2070vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:1487vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2069vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:1462vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2047vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:1413vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2044vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:1415vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2041vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:1414vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:2043vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:1320vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:0694vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:0924vendor-advisory
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