What is RHSA-2026:21743?

RHSA-2026:21743 is a security advisory published by Red Hat Product Security with High severity. Red Hat Security Advisory: firefox security update

Which CVE IDs does RHSA-2026:21743 cover?

RHSA-2026:21743 covers the following CVE IDs: CVE-2026-7322, CVE-2026-7323, CVE-2026-7320, CVE-2026-7321. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of RHSA-2026:21743?

RHSA-2026:21743 has a CVSS v3 base score of 8.8, published by Red Hat Product Security.

RHSA-2026:21743HighCVSS 8.8

Red Hat Security Advisory: firefox security update

Vendor

Red Hat Product Security

Published

May 28, 2026

Last Modified

June 3, 2026

🔗 CVE IDs covered (4)

CVE-2026-7322 →CVE-2026-7323 →CVE-2026-7320 →CVE-2026-7321 →

📋 Description

CVE-2026-7320 — firefox: thunderbird: Information disclosure due to incorrect boundary conditions in the Audio/Video component CVE-2026-7321 — firefox: thunderbird: webrtc: Sandbox escape due to incorrect boundary conditions in the WebRTC: Networking component CVE-2026-7322 — firefox: thunderbird: Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1 CVE-2026-7323 — firefox: thunderbird: Memory safety bugs fixed in Firefox ESR 140.10.1 and Firefox 150.0.1

🔗 References (7)

selfhttps://access.redhat.com/errata/RHSA-2026:21743
externalhttps://access.redhat.com/security/updates/classification/#important
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2463481
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2463483
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2463484
externalhttps://bugzilla.redhat.com/show_bug.cgi?id=2463485
selfhttps://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_21743.json