CVE-2026-12297
9.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mozilla | Firefox | 115.37 <= 115.* | unaffected |
| Mozilla | Firefox | 140.12 <= 140.* | unaffected |
| Mozilla | Firefox | 152 <= * | unaffected |
| Mozilla | Thunderbird | 140.12 <= 140.* | unaffected |
| Mozilla | Thunderbird | 152 <= * | unaffected |
Weaknesses
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
firefox: thunderbird: Sandbox escape due to incorrect boundary conditions in the Networking component
Additional References
- https://access.redhat.com/security/cve/CVE-2026-12297
- https://bugzilla.redhat.com/show_bug.cgi?id=2489235
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12297.json
- https://access.redhat.com/errata/RHSA-2026:27733
- https://access.redhat.com/errata/RHSA-2026:30846
- https://access.redhat.com/errata/RHSA-2026:27717
- https://access.redhat.com/errata/RHSA-2026:33445
- https://access.redhat.com/errata/RHSA-2026:27734
- https://access.redhat.com/errata/RHSA-2026:29940
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/
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.