Medium [CVE-2026-3889] Spoofing issue in Thunderbird
This medium-severity Red Hat Linux advisory covers CVE-2026-3889 affecting Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 1.
Android app · Google Play
Monitor future Red Hat Linux CVEs from your phone.
Choose a whole vendor or a precise platform, then receive matching security advisories by phone notification, email, or both. Coverage follows 32 official vendor sources and 160+ reviewed platform categories.
Summary
Spoofing issue in Thunderbird. Red Hat rates this low (CVSS 5.4).
Weakness: CWE-20. Affected package(s): thunderbird.
Resolved in Red Hat advisory RHSA-2026:8286 — update the affected packages (`sudo dnf update`).
Affected products named by the advisory: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 1.
- thunderbird-0:140.9.0-1.el8_2
- thunderbird-0:140.9.0-1.el9_0
- thunderbird-0:140.9.0-1.el8_4
- thunderbird-0:140.9.0-1.el9_2
- thunderbird-0:140.9.0-1.el10_1
- thunderbird-0:140.9.0-1.el8_6
- thunderbird-0:140.9.0-1.el10_0
- thunderbird-0:140.9.0-1.el9_4
- thunderbird-0:140.9.0-1.el8_8
- thunderbird-0:140.9.0-1.el9_7
- thunderbird-0:140.9.0-1.el9_6
- thunderbird-0:140.9.0-1.el8_10
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
- RHSA-2026:8286
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-2026:8286 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Discussion(0)
No comments yet. Share field notes, upgrade gotchas, or questions — verify against the vendor advisory before acting on community advice.
Sign in to join the discussion.