CVE-2026-4700

严重 9.8CVE-2026-4700 · Published 24/03/2026 · updated 15/07/2026

要点

CVE-2026-4700 是影响 firefox (mozilla) 的严重 (CVSS 9.8)漏洞。
未来 30 天内被利用的概率（EPSS）：0.92%，高于 60.2% 的漏洞。
修复：升级到 140.9.0, 149.0 或更高版本。

Package	Affected versions	Patched versions
firefox mozilla	`< 140.9.0< 149.0`	`140.9.0149.0`

Description

Mitigation bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

References

bugzilla.mozilla.org/show_bug.cgi · Permissions Required
mozilla.org/security/advisories/mfsa2026-20 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-22 · Vendor Advisory
mozilla.org/security/advisories/mfsa2026-23
mozilla.org/security/advisories/mfsa2026-24
access.redhat.com/errata/RHSA-2026:5930
access.redhat.com/errata/RHSA-2026:5931
access.redhat.com/errata/RHSA-2026:5932
access.redhat.com/errata/RHSA-2026:6188
access.redhat.com/errata/RHSA-2026:6342
access.redhat.com/errata/RHSA-2026:6917
access.redhat.com/errata/RHSA-2026:7837
access.redhat.com/errata/RHSA-2026:7838
access.redhat.com/errata/RHSA-2026:7839
access.redhat.com/errata/RHSA-2026:7840
access.redhat.com/errata/RHSA-2026:7841
access.redhat.com/errata/RHSA-2026:7842
access.redhat.com/errata/RHSA-2026:7843
access.redhat.com/errata/RHSA-2026:7845
access.redhat.com/errata/RHSA-2026:7858
access.redhat.com/errata/RHSA-2026:8284
access.redhat.com/errata/RHSA-2026:8285
access.redhat.com/errata/RHSA-2026:8286
access.redhat.com/errata/RHSA-2026:8287
access.redhat.com/errata/RHSA-2026:8288
access.redhat.com/errata/RHSA-2026:8289
access.redhat.com/errata/RHSA-2026:8290
access.redhat.com/errata/RHSA-2026:8315
access.redhat.com/errata/RHSA-2026:8427
access.redhat.com/errata/RHSA-2026:8850
access.redhat.com/security/cve/CVE-2026-4700
bugzilla.redhat.com/show_bug.cgi
security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4700.json

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