Description
An attacker could write data to the user's clipboard, bypassing the user prompt, during a certain sequence of navigational events. This vulnerability affects Firefox < 129, Firefox ESR < 128.3, and Thunderbird < 128.3.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 129 | 129 |
| Mozilla | Firefox ESR | unspecified – < 128.3 | 128.3 |
| Mozilla | Thunderbird | unspecified – < 128.3 | 128.3 |
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 | 1:128.3.0esr-1 | — |
| Debian 13 | thunderbird | 1:128.3.0esr-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | firefox | 129.0.1+build1-0ubuntu0.20.04.1 | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 8 | firefox | 128.3.0-1.el8_10 | RHSA-2024:7700 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | firefox +1 | 128.3.0-1.el9_2 | RHSA-2024:7622 |
| RHEL 9.0 E4S | firefox | 128.3.0-1.el9_0 | RHSA-2024:7621 |
| RHEL 8.8 EUS | firefox | 128.3.0-1.el8_8 | RHSA-2024:7842 |
| RHEL 8.6 TUS | firefox | 128.3.0-1.el8_6 | RHSA-2024:7704 |
| RHEL 8.6 E4S | firefox | 128.3.0-1.el8_6 | RHSA-2024:7704 |
| RHEL 8.6 AUS | firefox | 128.3.0-1.el8_6 | RHSA-2024:7704 |
| RHEL 8.4 TUS | firefox | 128.3.0-1.el8_4 | RHSA-2024:7703 |
| RHEL 8.4 E4S | firefox | 128.3.0-1.el8_4 | RHSA-2024:7703 |
| RHEL 8.4 AUS | firefox | 128.3.0-1.el8_4 | RHSA-2024:7703 |
| RHEL 8.2 AUS | firefox | 128.3.0-1.el8_2 | RHSA-2024:7646 |
| RHEL 7 ELS | firefox | 128.3.0-1.el7_9 | RHSA-2024:7702 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 8 | firefox | 128.3.0-1.el8_10.alma.1 | ALSA-2024:7700 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | firefox | 128.3.0-1.el8_10 | RLSA-2024:7700 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLES 15 SP6 | MozillaThunderbird | 128.3.0-150200.8.182.1 | SUSE-SU-2024:3629-1 |
| SLES 15 SP5 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLES 15 SP5 | MozillaThunderbird | 128.3.0-150200.8.182.1 | SUSE-SU-2024:3629-1 |
| SLES 15 SP4 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLES 15 SP3 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLES 15 SP2 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
Show 9 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 128.3.0-112.228.1 | SUSE-SU-2024:3603-1, SUSE-SU-2024:3518-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLES for SAP 12 SP5 | MozillaFirefox | 128.3.0-112.228.1 | SUSE-SU-2024:3603-1, SUSE-SU-2024:3518-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Tumbleweed | mozjs128 +1 | 128.3.1-1.1 | openSUSE-SU-2024:14397-1, openSUSE-SU-2024:14394-1 |
| openSUSE Leap 15.6 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| openSUSE Leap 15.6 | MozillaThunderbird | 128.3.0-150200.8.182.1 | SUSE-SU-2024:3629-1 |
| openSUSE Leap 15.5 | MozillaFirefox | 128.3.0-150200.152.152.1 | SUSE-SU-2024:3614-1, SUSE-SU-2024:3519-1 |
| openSUSE Leap 15.5 | MozillaThunderbird | 128.3.0-150200.8.182.1 | SUSE-SU-2024:3629-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | thunderbird | 128.7.0-1.amzn2.0.2 | ALAS2-2025-2789 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 8 | firefox | 128.3.0-1.0.1.el8_10 | ELSA-2024-7700 |
| Oracle Linux 7 | firefox | 128.3.0-1.0.1.el7_9 | ELSA-2024-7702 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 129-r0 | — |
Advisories 24
- ALSA-2024:7700 Important: firefox security update AlmaLinux Security Advisories · Nov 6, 2026
- RHSA-2024:7842 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:7704 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:7702 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:7703 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:7646 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:7700 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:7621 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RHSA-2024:7622 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 25, 2026
- RLSA-2024:7700 Important: firefox security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:14394-1 MozillaThunderbird-128.3.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3519-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3518-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14397-1 libmozjs-128-0-128.3.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3603-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3629-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14572-1 firefox-esr-128.5.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3614-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- WID-SEC-2024-3057 Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 2, 2026
- WID-SEC-2024-1783 Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 17, 2025
- ALAS2-2025-2789 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 7, 2025
- ELSA-2024-7702 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Oct 24, 2024
- ELSA-2024-7700 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 7, 2024
- NCSC-2024-0387 Kwetsbaarheden verholpen in Mozilla Firefox en Thunderbird NCSC-NL (Netherlands) · Oct 2, 2024