by Kastro
Paper/Archive/CVE-2026-2807

CVE-2026-2807

Mozilla Firefox — Memory safety bugs fixed in Firefox 148 and Thunderbird 148

EPSS 0.3%CVSS 9.8
critical.is priorityof 100
34
CVSS 9.8 (ADP, NVD agree)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 22.0.220 × 204.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
Firefoxsee advisory148CNA
Thunderbirdsee advisory148CNA
Red Hat Enterprise Linux 10see advisory–redhat-SADP
Red Hat Enterprise Linux 10see advisory–redhat-SADP
Red Hat Enterprise Linux 10see advisory–redhat-SADP
Red Hat Enterprise Linux 10see advisory–redhat-SADP
Red Hat Enterprise Linux 6see advisory–redhat-SADP
Red Hat Enterprise Linux 6see advisory–redhat-SADP
Red Hat Enterprise Linux 7see advisory–redhat-SADP
Red Hat Enterprise Linux 7see advisory–redhat-SADP
Red Hat Enterprise Linux 8see advisory–redhat-SADP
Red Hat Enterprise Linux 8see advisory–redhat-SADP

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
redhat-SADP (CNA)7.5CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refbugzilla.mozilla.org/buglist.cgi?bug_id=1756056%2C1999402%2C2004872%2C2006037%2C2012855refmozilla.org/security/advisories/mfsa2026-13refmozilla.org/security/advisories/mfsa2026-16refaccess.redhat.com/security/cve/CVE-2026-2807refbugzilla.redhat.com/show_bug.cgi?id=2442296refsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2807.json