CVE-2026-7321
critical
CVSS v3
9.6
CVSS v4 NEW
—
VIR risk
9.6
Description
RHSA-2026:20586: thunderbird security update (Important)
Predictions
Exploit likelihood
96%
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
AlmaLinux Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | thunderbird-140.10.1-1.el9_8.alma.1.x86_64.rpm |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 140.10.1esr-1~deb13u1 |
| sid | Fixed | 140.10.1esr-1 |
| forky | Fixed | 140.10.1esr-1 |
| bullseye | Fixed | 140.10.1esr-1~deb11u1 |
| bookworm | Fixed | 140.10.1esr-1~deb12u1 |
Red Hat Fixed 2 releases
| Version | Status | Fixed in |
|---|---|---|
| 9 | Fixed | — |
| 8 | Fixed | — |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| mozilla | firefox | {"endExcluding":"140.10.1"} | 140.10.1 |
| mozilla | thunderbird | {"endExcluding":"140.10.1"} | 140.10.1 |
References
- https://access.redhat.com/errata/RHSA-2026:19348
- https://access.redhat.com/errata/RHSA-2026:19370
- https://bugzilla.mozilla.org/show_bug.cgi?id=2029461
- https://www.mozilla.org/security/advisories/mfsa2026-30/
- https://www.mozilla.org/security/advisories/mfsa2026-33/
- https://www.mozilla.org/security/advisories/mfsa2026-36/
- https://www.mozilla.org/security/advisories/mfsa2026-39/
- https://security-tracker.debian.org/tracker/CVE-2026-7321
- https://access.redhat.com/errata/RHSA-2026:19588
- https://bugzilla.redhat.com/2463481
- https://bugzilla.redhat.com/2463483
- https://bugzilla.redhat.com/2463484
- https://bugzilla.redhat.com/2463485
- https://errata.almalinux.org/8/ALSA-2026-19588.html
- https://access.redhat.com/errata/RHSA-2026:20586
- https://errata.almalinux.org/8/ALSA-2026-20586.html
- https://errata.almalinux.org/9/ALSA-2026-19370.html
- https://bugzilla.redhat.com/2460074
- https://bugzilla.redhat.com/2460075
- https://bugzilla.redhat.com/2460076
- https://bugzilla.redhat.com/2460078
- https://bugzilla.redhat.com/2460079
- https://bugzilla.redhat.com/2460085
- https://bugzilla.redhat.com/2460086
- https://bugzilla.redhat.com/2460088
CWEs
CWE-120
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.