CVE-2026-12299
5.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Summary
JIT miscompilation in the DOM: Core & HTML 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: partial
firefox: thunderbird: JIT miscompilation in the DOM: Core & HTML component
Additional References
- https://access.redhat.com/security/cve/CVE-2026-12299
- https://bugzilla.redhat.com/show_bug.cgi?id=2489212
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12299.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=2043139
- 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/
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