CVE-2026-8974
high
CVSS v3
8.8
CVSS v4 NEW
—
VIR risk
8.8
Description
Important: thunderbird security update
Predictions
Exploit likelihood
92%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
AlmaLinux Fixed 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | firefox-x11-140.11.0-1.el9_8.alma.1.ppc64le.rpm |
| 8 | Fixed | firefox-140.11.0-1.el8_10.alma.1.aarch64.rpm |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 140.11.0esr-1~deb13u1 |
| sid | Fixed | 151.0-1 |
| forky | Fixed | 140.11.0esr-1 |
| bullseye | Fixed | 140.11.0esr-1~deb11u1 |
| bookworm | Fixed | 140.11.0esr-1~deb12u1 |
Red Hat Fixed 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | — |
| 8 | Fixed | — |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| mozilla | firefox | {"endExcluding":"140.11.0"} | 140.11.0 |
| mozilla | thunderbird | {"endExcluding":"140.11"} | 140.11 |
References
- https://access.redhat.com/errata/RHSA-2026:21381
- https://bugzilla.mozilla.org/buglist.cgi?bug_id=1784128%2C1883230%2C1983677%2C2022390%2C2023116%2C2023657%2C2024255%2C2024418%2C2024441%2C2024447%2C2024966%2C2025412%2C2025467%2C2025940%2C2025950%2C2025956%2C2026284%2C2027247%2C2027255%2C2027288%2C2027306%2C2027322%2C2027332%2C2027333%2C2028266%2C2028292%2C2028319%2C2028526%2C2028870%2C2028876%2C2028882%2C2029062%2C2029309%2C2029414%2C2029422%2C2029428%2C2029447%2C2029732%2C2029785%2C2029793%2C2029813%2C2029899%2C2031028%2C2031457%2C2032039%2C2033610%2C2033854%2C2034498%2C2034628%2C2034978%2C2035966%2C2036668%2C2036905%2C2036930
- https://www.mozilla.org/security/advisories/mfsa2026-46/
- https://www.mozilla.org/security/advisories/mfsa2026-48/
- https://www.mozilla.org/security/advisories/mfsa2026-50/
- https://www.mozilla.org/security/advisories/mfsa2026-51/
- https://security-tracker.debian.org/tracker/CVE-2026-8974
- https://www.suse.com/security/cve/CVE-2026-8974.html
- https://access.redhat.com/errata/RHSA-2026:21378
- https://access.redhat.com/errata/RHSA-2026:21382
- https://bugzilla.redhat.com/2476469
- https://bugzilla.redhat.com/2476475
- https://bugzilla.redhat.com/2476492
- https://bugzilla.redhat.com/2479839
- https://bugzilla.redhat.com/2479840
- https://bugzilla.redhat.com/2479842
- https://bugzilla.redhat.com/2479846
- https://bugzilla.redhat.com/2479847
- https://bugzilla.redhat.com/2479848
- https://bugzilla.redhat.com/2479849
- https://bugzilla.redhat.com/2479852
- https://bugzilla.redhat.com/2479853
- https://bugzilla.redhat.com/2479855
- https://bugzilla.redhat.com/2479860
- https://bugzilla.redhat.com/2479871
CWEs
CWE-119
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.