by Kastro CVE-2026-4700
Mozilla Firefox — Mitigation bypass in the Networking: HTTP component
Description · from the CVE record
Mitigation bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
Affected
ProductAffectedFixed inSource
Firefoxsee advisory140.9CNA
Thunderbirdsee advisory140.9CNA
Red Hat Enterprise Linux 10see advisory0:140.9.0-1.el10_1redhat-SADP
Red Hat Enterprise Linux 10see advisory0:140.9.0-1.el10_1redhat-SADP
Red Hat Enterprise Linux 10.0 Extended Update Supportsee advisory0:140.9.0-1.el10_0redhat-SADP
Red Hat Enterprise Linux 10.0 Extended Update Supportsee advisory0:140.9.0-1.el10_0redhat-SADP
Red Hat Enterprise Linux 7 Extended Lifecycle Supportsee advisory0:140.9.0-1.el7_9redhat-SADP
Red Hat Enterprise Linux 8see advisory0:140.9.0-1.el8_10redhat-SADP
Red Hat Enterprise Linux 8see advisory0:140.9.0-1.el8_10redhat-SADP
Red Hat Enterprise Linux 8.2 Advanced Update Supportsee advisory0:140.9.0-1.el8_2redhat-SADP
Red Hat Enterprise Linux 8.2 Advanced Update Supportsee advisory0:140.9.0-1.el8_2redhat-SADP
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Supportsee advisory0:140.9.0-1.el8_4redhat-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