Description
The origin of an external protocol handler prompt could have been obscured using a data: URL within an `iframe`. This vulnerability affects Firefox < 132, Firefox ESR < 128.4, Thunderbird < 128.4, and Thunderbird < 132.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 132 | 132 |
| Mozilla | Firefox ESR | unspecified – < 128.4 | 128.4 |
| Mozilla | Thunderbird | unspecified – < 128.4, unspecified – < 132 | 128.4 |
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 | firefox-esr | 128.4.0esr-1 | — |
| Debian 14 | thunderbird | 1:128.4.0esr-1 | — |
| Debian 13 | firefox-esr | 128.4.0esr-1 | — |
| Debian 13 | thunderbird | 1:128.4.0esr-1 | — |
| Debian 12 | firefox-esr | 128.4.0esr-1~deb12u1 | DSA-5801-1 |
| Debian 12 | thunderbird | 1:128.4.0esr-1~deb12u1 | DSA-5803-1 |
| Debian 11 | firefox-esr | 128.4.0esr-1~deb11u1 | DLA-3943-1 |
| Debian 11 | thunderbird | 1:128.4.0esr-1~deb11u1 | DLA-3944-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | mozjs102 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | mozjs78 +2 | No fix yet | — |
| Ubuntu 22.04 LTS | thunderbird | 1:140.7.1+build1-0ubuntu0.22.04.1 | — |
| Ubuntu 20.04 LTS | firefox | 132.0+build1-0ubuntu0.20.04.1 | USN-7086-1 |
| 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 9 | firefox +2 | 128.4.0-1.el9_4 | RHSA-2024:9554, RHSA-2024:9552, RHSA-2024:8793 |
| RHEL 8 | firefox +1 | 128.4.0-1.el8_10 | RHSA-2024:8790, RHSA-2024:8729 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | firefox +2 | 128.4.0-1.el9_2 | RHSA-2024:8728, RHSA-2024:8720 |
| RHEL 9.0 E4S | firefox +1 | 128.4.0-1.el9_0 | RHSA-2024:9019, RHSA-2024:8721 |
| RHEL 8.8 EUS | firefox +1 | 128.4.0-1.el8_8 | RHSA-2024:9018, RHSA-2024:8722 |
| RHEL 8.6 TUS | firefox +1 | 128.4.0-1.el8_6 | RHSA-2024:9017, RHSA-2024:8725 |
| RHEL 8.6 E4S | firefox +1 | 128.4.0-1.el8_6 | RHSA-2024:9017, RHSA-2024:8725 |
| RHEL 8.6 AUS | firefox +1 | 128.4.0-1.el8_6 | RHSA-2024:9017, RHSA-2024:8725 |
| RHEL 8.4 TUS | firefox +1 | 128.4.0-1.el8_4 | RHSA-2024:9015, RHSA-2024:8723 |
| RHEL 8.4 E4S | firefox +1 | 128.4.0-1.el8_4 | RHSA-2024:9015, RHSA-2024:8723 |
| RHEL 8.4 AUS | firefox +1 | 128.4.0-1.el8_4 | RHSA-2024:9015, RHSA-2024:8723 |
| RHEL 8.2 AUS | firefox +1 | 128.4.0-1.el8_2 | RHSA-2024:9016, RHSA-2024:8724 |
| RHEL 7 ELS | firefox | 128.4.0-1.el7_9 | RHSA-2024:8727 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +1 | 128.4.0-1.el9_4 | ALSA-2024:9554, ALSA-2024:8726 |
| AlmaLinux 9 | thunderbird | 128.4.0-1.el9_4.alma.1 | ALSA-2024:9552, ALSA-2024:8793 |
| AlmaLinux 8 | firefox | 128.4.0-1.el8_10 | ALSA-2024:8729 |
| AlmaLinux 8 | thunderbird | 128.4.0-1.el8_10.alma.1 | ALSA-2024:8790 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 9 | firefox +1 | 128.4.0-1.el9_4 | RLSA-2024:8793, RLSA-2024:8726 |
| Rocky Linux 8 | firefox +1 | 128.4.0-1.el8_10 | RLSA-2024:8790, RLSA-2024:8729 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP6 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLES 15 SP6 | MozillaThunderbird | 128.4.3-150200.8.188.1 | SUSE-SU-2024:4050-1 |
| SLES 15 SP5 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLES 15 SP5 | MozillaThunderbird | 128.4.3-150200.8.188.1 | SUSE-SU-2024:4050-1 |
| SLES 15 SP4 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLES 15 SP3 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLES 15 SP2 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 128.4.0-112.234.2 | SUSE-SU-2024:3899-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLES for SAP 15 SP2 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SLE HPC 15 SP2 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 132.0.1-1.1 | openSUSE-SU-2024:14483-1 |
| openSUSE Tumbleweed | firefox-esr | 128.5.1-1.1 | openSUSE-SU-2024:14572-1 |
| openSUSE Tumbleweed | mozjs128 +1 | 128.4.0-1.1 | openSUSE-SU-2024:14461-1, openSUSE-SU-2024:14438-1 |
| openSUSE Leap 15.6 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| openSUSE Leap 15.6 | MozillaThunderbird | 128.4.3-150200.8.188.1 | SUSE-SU-2024:4050-1 |
| openSUSE Leap 15.5 | MozillaFirefox | 128.4.0-150200.152.158.1 | SUSE-SU-2024:3898-1 |
| openSUSE Leap 15.5 | MozillaThunderbird | 128.4.3-150200.8.188.1 | SUSE-SU-2024:4050-1 |
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 9 | firefox +2 | 128.4.0-1.0.1.el9_4 | ELSA-2024-9554, ELSA-2024-9552, ELSA-2024-8793 |
| Oracle Linux 8 | firefox +1 | 128.4.0-1.0.1.el8_10 | ELSA-2024-8790, ELSA-2024-8729 |
| Oracle Linux 7 | firefox | 128.4.0-1.0.1.el7_9 | ELSA-2024-8727 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 132.0-r0 | — |
Advisories 50
- ALSA-2024:9554 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:9552 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:8726 Moderate: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:8793 Moderate: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:8729 Moderate: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:8790 Moderate: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2024:9554 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2024:9552 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- RHSA-2024:9019 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:9017 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:9018 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:9016 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:9015 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8793 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8729 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8790 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8727 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8728 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8725 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8726 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8723 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8724 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8721 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8722 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- RHSA-2024:8720 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jun 26, 2026
- USN-7086-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DSA-5801-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5803-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3944-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3943-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2024:8729 Moderate: firefox security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:8790 Moderate: thunderbird security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:8726 Moderate: firefox security update Rocky Linux Security Advisories · Feb 5, 2026
- RLSA-2024:8793 Moderate: thunderbird security update Rocky Linux Security Advisories · Feb 4, 2026
- openSUSE-SU-2024:14461-1 libmozjs-128-0-128.4.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14483-1 MozillaFirefox-132.0.1-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:14438-1 MozillaThunderbird-128.4.0-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3899-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:4050-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:3898-1 Security update for MozillaFirefox 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
- WID-SEC-2024-3296 Mozilla Firefox, ESR und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Feb 2, 2026
- ALAS2-2025-2789 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Mar 7, 2025
- ELSA-2024-9554 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 18, 2024
- ELSA-2024-9552 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 18, 2024
- ELSA-2024-8727 Moderate: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 8, 2024
- ELSA-2024-8790 Moderate: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 4, 2024
- ELSA-2024-8793 Moderate: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 4, 2024
- ELSA-2024-8726 Moderate: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Nov 1, 2024
- ELSA-2024-8729 Moderate: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Nov 1, 2024