critical9.8
CVE-2026-2807
Memory safety bugs present in Firefox 147 and Thunderbird 147.
Impact
Memory safety bugs present in Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 148 and Thunderbird 148.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mozilla | Firefox | before 148.0 |
| Mozilla | Thunderbird | before 148.0 |
Weakness classification
References
- NVD record
- CVE.org record
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1756056%2C1999402%2C2004872%2C2006037%2C2012855
- https://www.mozilla.org/security/advisories/mfsa2026-13/
- https://www.mozilla.org/security/advisories/mfsa2026-16/
- https://access.redhat.com/security/cve/CVE-2026-2807
- https://bugzilla.redhat.com/show_bug.cgi?id=2442296
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2807.json