CVE-2026-12297
Sandbox escape due to incorrect boundary conditions in the Networking component
- State
- Published
- Severity
- 9.6 Critical
- Published
- Jun 16, 2026
- Updated
- Jul 15, 2026
- Reserved
- Jun 15, 2026
Description
Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 9.6 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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
Affected Products
| Product | Versions |
|---|---|
FirefoxMozilla |
|
ThunderbirdMozilla |
|
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2041610
- https://www.mozilla.org/security/advisories/mfsa2026-57/
- https://www.mozilla.org/security/advisories/mfsa2026-58/
- https://www.mozilla.org/security/advisories/mfsa2026-59/
- https://www.mozilla.org/security/advisories/mfsa2026-60/
- https://www.mozilla.org/security/advisories/mfsa2026-61/
- https://access.redhat.com/security/cve/CVE-2026-12297vdb-entry
- RHBZ#2489235issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12297.json
- https://access.redhat.com/errata/RHSA-2026:38506vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:36100vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:38751vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:27733vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:30846vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:27717vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:33445vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:36102vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:39428vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:37210vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:39141vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:36103vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:39142vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:36101vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:39706vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:39011vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:38753vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:37391vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:38750vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:27734vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:29940vendor-advisory
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