Description
Spoofing issue in Thunderbird. This vulnerability was fixed in Thunderbird 149 and Thunderbird 140.9.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Thunderbird | — | 140.9 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | thunderbird | 1:140.9.0esr-1 | — |
| Debian 13 | thunderbird | 1:140.9.0esr-1~deb13u1 | DSA-6179-1 |
| Debian 12 | thunderbird | 1:140.9.0esr-1~deb12u1 | DSA-6179-1 |
| Debian 11 | thunderbird | 1:140.9.0esr-1~deb11u1 | DLA-4511-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | mozjs102 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | mozjs78 +3 | No fix yet | — |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | thunderbird | 140.9.0-1.el10_1 | RHSA-2026:6342 |
| RHEL 9 | thunderbird | 140.9.0-1.el9_7 | RHSA-2026:6188 |
| RHEL 8 | thunderbird | 140.9.0-1.el8_10 | RHSA-2026:6917 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | thunderbird | 140.9.0-1.el10_0 | RHSA-2026:8315 |
| RHEL 9.6 EUS | thunderbird | 140.9.0-1.el9_6 | RHSA-2026:8284 |
| RHEL 9.4 EUS | thunderbird | 140.9.0-1.el9_4 | RHSA-2026:8290 |
| RHEL 9.2 E4S | thunderbird | 140.9.0-1.el9_2 | RHSA-2026:8287 |
| RHEL 9.0 E4S | thunderbird | 140.9.0-1.el9_0 | RHSA-2026:8286 |
| RHEL 8.8 TUS | thunderbird | 140.9.0-1.el8_8 | RHSA-2026:8288 |
| RHEL 8.8 E4S | thunderbird | 140.9.0-1.el8_8 | RHSA-2026:8288 |
| RHEL 8.6 TUS | thunderbird | 140.9.0-1.el8_6 | RHSA-2026:8289 |
| RHEL 8.6 E4S | thunderbird | 140.9.0-1.el8_6 | RHSA-2026:8289 |
| RHEL 8.6 AUS | thunderbird | 140.9.0-1.el8_6 | RHSA-2026:8289 |
| RHEL 8.4 EUS Long Life | thunderbird | 140.9.0-1.el8_4 | RHSA-2026:8850 |
| RHEL 8.4 AUS | thunderbird | 140.9.0-1.el8_4 | RHSA-2026:8850 |
| RHEL 8.2 AUS | thunderbird | 140.9.0-1.el8_2 | RHSA-2026:8285 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | thunderbird | 140.9.0-1.el10_1.alma.1 | ALSA-2026:6342 |
| AlmaLinux 9 | thunderbird | 140.9.0-1.el9_7.alma.1 | ALSA-2026:6188 |
| AlmaLinux 8 | thunderbird | 140.9.0-1.el8_10.alma.1 | ALSA-2026:6917 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | thunderbird | 140.9.0-1.el10_1 | RLSA-2026:6342 |
| Rocky Linux 9 | thunderbird | 140.9.0-1.el9_7 | RLSA-2026:6188 |
| Rocky Linux 8 | thunderbird | 140.9.0-1.el8_10 | RLSA-2026:6917 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaThunderbird | 140.9.0-1.1 | openSUSE-SU-2026:10447-1 |
| openSUSE Leap 15.6 | MozillaThunderbird | 140.9.0-150200.8.263.1 | SUSE-SU-2026:1163-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 140.9.0-1.amzn2.0.2 | ALAS2-2026-3241 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | thunderbird | 140.9.0-1.0.1.el10_1 | ELSA-2026-6342 |
| Oracle Linux 9 | thunderbird | 140.9.0-1.0.1.el9_7 | ELSA-2026-6188 |
| Oracle Linux 8 | thunderbird | 140.9.0-1.0.1.el8_10 | ELSA-2026-6917 |
Advisories 27
- WID-SEC-2026-0850 Mozilla Firefox und Mozilla Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 8, 2026
- ALSA-2026:6342 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:6188 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:6917 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:8850 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:8315 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:8290 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:8288 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:8289 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:8286 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:8287 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:8284 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:8285 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:6917 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:6342 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:6188 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- ALAS2-2026-3241 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Apr 13, 2026
- RLSA-2026:6917 Important: thunderbird security update Rocky Linux Security Advisories · Apr 12, 2026
- RLSA-2026:6342 Important: thunderbird security update Rocky Linux Security Advisories · Apr 9, 2026
- RLSA-2026:6188 Important: thunderbird security update Rocky Linux Security Advisories · Apr 7, 2026
- ELSA-2026-6917 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Apr 7, 2026
- SUSE-SU-2026:1163-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Apr 2, 2026
- ELSA-2026-6342 Important: thunderbird security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Apr 1, 2026
- ELSA-2026-6188 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Mar 30, 2026
- openSUSE-SU-2026:10447-1 MozillaThunderbird-140.9.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 29, 2026
- DLA-4511-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 27, 2026
- DSA-6179-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 26, 2026