Medium [CVE-2026-6762] Spoofing issue in the DOM: Core & HTML component
This medium-severity Red Hat Linux advisory covers CVE-2026-6762 affecting Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 1, Red Hat Enterprise Linux 9.
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Summary
Spoofing issue in the DOM: Core & HTML component. Red Hat rates this moderate (CVSS 6.1).
Weakness: CWE-1021. Affected package(s): thunderbird, firefox.
Resolved in Red Hat advisory RHSA-2026:10757 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 1; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 7.
- thunderbird-0:140.10.0-1.el8_10
- firefox-0:140.10.0-1.el10_1
- firefox-0:140.10.0-1.el9_8
- firefox-0:140.10.0-1.el10_0
- firefox-0:140.10.0-1.el10_2
- thunderbird-0:140.10.0-1.el8_4
- firefox-0:140.10.0-1.el9_0
- thunderbird-0:140.10.0-1.el9_2
- firefox-0:140.10.0-1.el9_2
- firefox-0:140.10.0-1.el8_4
- thunderbird-0:140.10.0-1.el9_0
- firefox-0:140.10.0-1.el9_4
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:10757
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Update the affected package(s) to the fixed version shipped in RHSA-2026:10757 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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