Description
When viewing an email message A, which contains an attached message B, where B is encrypted or digitally signed or both, Thunderbird may show an incorrect encryption or signature status. After opening and viewing the attached message B, when returning to the display of message A, the message A might be shown with the security status of message B. This vulnerability affects Thunderbird < 91.9.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Thunderbird | unspecified – < 91.9 | 91.9 |
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 | 1:91.9.0-1 | — |
| Debian 13 | thunderbird | 1:91.9.0-1 | — |
| Debian 12 | thunderbird | 1:91.9.0-1 | — |
| Debian 11 | thunderbird | 1:91.9.0-1~deb11u1 | DSA-5141-1 |
| Debian 10 | thunderbird | 1:91.9.0-1~deb10u1 | DSA-5141-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 9 | thunderbird | 1:91.9.0-1~deb9u1 | DLA-3020-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | thunderbird | 1:91.9.1+build1-0ubuntu0.22.04.1 | USN-5435-1 |
| Ubuntu 20.04 LTS | thunderbird | 1:91.9.1+build1-0ubuntu0.20.04.1 | USN-5435-1 |
| Ubuntu 18.04 LTS | thunderbird | 1:91.9.1+build1-0ubuntu0.18.04.1 | USN-5435-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | thunderbird | 91.9.0-3.el9_0 | RHSA-2022:4589 |
| RHEL 8 | thunderbird | 91.9.0-3.el8_5 | RHSA-2022:1730 |
| RHEL 7 | thunderbird | 91.9.0-3.el7_9 | RHSA-2022:1725 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8.4 EUS | thunderbird | 91.9.0-3.el8_4 | RHSA-2022:1726 |
| RHEL 8.2 EUS | thunderbird | 91.9.0-3.el8_2 | RHSA-2022:1724 |
| RHEL 8.1 E4S | thunderbird | 91.9.0-3.el8_1 | RHSA-2022:1727 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | thunderbird | 91.9.0-3.el8_5.alma | ALSA-2022:1730 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | thunderbird | 91.9.0-3.el8_5 | RLSA-2022:1730 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | MozillaThunderbird | 91.9.0-150200.8.68.2 | SUSE-SU-2022:1719-1 |
| SLES 15 SP3 | MozillaThunderbird | 91.9.0-150200.8.68.2 | SUSE-SU-2022:1719-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaThunderbird | 91.9.0-1.1 | openSUSE-SU-2024:12045-1 |
| openSUSE Leap 15.4 | MozillaThunderbird | 91.9.0-150200.8.68.2 | SUSE-SU-2022:1719-1 |
| openSUSE Leap 15.3 | MozillaThunderbird | 91.9.0-150200.8.68.2 | SUSE-SU-2022:1719-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.23 | thunderbird | 91.9.0-r0 | — |
| Alpine v3.22 | thunderbird | 91.9.0-r0 | — |
| Alpine v3.21 | thunderbird | 91.9.0-r0 | — |
| Alpine v3.20 | thunderbird | 91.9.0-r0 | — |
| Alpine v3.19 | thunderbird | 91.9.0-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.18 | thunderbird | 91.9.0-r0 | — |
| Alpine v3.17 | thunderbird | 91.9.0-r0 | — |
| Alpine v3.16 | thunderbird | 91.9.0-r0 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | thunderbird | 91.9.0-3.0.1.el9_0 | ELSA-2022-4589 |
| Oracle Linux 8 | thunderbird | 91.9.0-3.0.1.el8_5 | ELSA-2022-1730 |
| Oracle Linux 7 | thunderbird | 91.9.0-3.0.1.el7_9 | ELSA-2022-1725 |
Advisories 18
- ALSA-2022:1730 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2022:1725 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-5435-1 thunderbird vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DSA-5141-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3020-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2022:1730 Important: thunderbird security update Rocky Linux Security Advisories · Feb 5, 2026
- openSUSE-SU-2024:12045-1 MozillaThunderbird-91.9.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:1719-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- RHSA-2022:4589 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:1730 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:1727 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:1726 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- RHSA-2022:1724 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Nov 22, 2025
- WID-SEC-2022-1335 Xerox FreeFlow Print Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 6, 2025
- WID-SEC-2022-0538 Mozilla Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Apr 1, 2025
- ELSA-2022-4589 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 30, 2022
- ELSA-2022-1730 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · May 5, 2022
- ELSA-2022-1725 Important: thunderbird security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · May 5, 2022