Description
An attacker could, via a specially crafted multipart response, execute arbitrary JavaScript under the `resource://devtools` origin. This could allow them to access cross-origin JSON content. This access is limited to "same site" documents by the Site Isolation feature on desktop clients, but full cross-origin access is possible on Android versions. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Firefox ESR < 115.16, Thunderbird < 128.3, and Thunderbird < 131.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | unspecified – < 131 | 131 |
| Mozilla | Firefox ESR | unspecified – < 128.3, unspecified – < 115.16 | 128.3 |
| Mozilla | Thunderbird | unspecified – < 128.3, unspecified – < 131 | 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 | firefox-esr | 128.3.0esr-1 | — |
| Debian 14 | thunderbird | 1:128.3.0esr-1 | — |
| Debian 13 | firefox-esr | 128.3.0esr-1 | — |
| Debian 13 | thunderbird | 1:128.3.0esr-1 | — |
| Debian 12 | firefox-esr | 128.3.0esr-1~deb12u1 | DSA-5783-1 |
| Debian 12 | thunderbird | 1:115.16.0esr-1~deb12u1 | DSA-5789-1 |
| Debian 11 | firefox-esr | 128.3.0esr-1~deb11u2 | DLA-3913-1 |
| Debian 11 | thunderbird | 1:115.16.0esr-1~deb11u1 | DLA-3916-1 |
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 | 1:115.18.0+build1-0ubuntu0.22.04.1 | — |
| Ubuntu 20.04 LTS | firefox | 131.0+build1.1-0ubuntu0.20.04.1 | USN-7056-1 |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 20.04 LTS | thunderbird | 1:115.18.0+build1-0ubuntu0.20.04.1 | — |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9 | firefox +2 | 128.3.0-1.el9_4 | RHSA-2024:7552, RHSA-2024:7505 |
| RHEL 8 | firefox +1 | 128.3.0-1.el8_10 | RHSA-2024:7700, RHSA-2024:7699 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 9.2 EUS | firefox +2 | 128.3.0-1.el9_2 | RHSA-2024:7853, RHSA-2024:7622 |
| RHEL 9.0 E4S | firefox +1 | 128.3.0-1.el9_0 | RHSA-2024:7855, RHSA-2024:7621 |
| RHEL 8.8 EUS | firefox | 128.3.0-1.el8_8 | RHSA-2024:7842 |
| RHEL 8.8 EUS | thunderbird | 128.3.1-1.el8_8 | RHSA-2024:8166 |
| RHEL 8.6 TUS | firefox +1 | 128.3.0-1.el8_6 | RHSA-2024:8169, RHSA-2024:7704 |
| RHEL 8.6 E4S | firefox +1 | 128.3.0-1.el8_6 | RHSA-2024:8169, RHSA-2024:7704 |
| RHEL 8.6 AUS | firefox +1 | 128.3.0-1.el8_6 | RHSA-2024:8169, RHSA-2024:7704 |
| RHEL 8.4 TUS | firefox +1 | 128.3.0-1.el8_4 | RHSA-2024:7854, RHSA-2024:7703 |
| RHEL 8.4 E4S | firefox +1 | 128.3.0-1.el8_4 | RHSA-2024:7854, RHSA-2024:7703 |
| RHEL 8.4 AUS | firefox +1 | 128.3.0-1.el8_4 | RHSA-2024:7854, RHSA-2024:7703 |
| RHEL 8.2 AUS | firefox +1 | 128.3.0-1.el8_2 | RHSA-2024:7856, RHSA-2024:7646 |
| RHEL 7 ELS | firefox | 128.3.0-1.el7_9 | RHSA-2024:7702 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 9 | firefox +2 | 128.3.0-1.el9_4.alma.1 | ALSA-2024:7552, ALSA-2024:7505 |
| AlmaLinux 8 | firefox +1 | 128.3.0-1.el8_10.alma.1 | ALSA-2024:7700, ALSA-2024:7699 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 8 | firefox +1 | 128.3.0-1.el8_10 | RLSA-2024:7700, RLSA-2024:7699 |
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 | MozillaFirefox | 131.0-1.1 | openSUSE-SU-2024:14385-1 |
| 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 | 115.16.0-1.amzn2.0.1 | ALAS2-2024-2690 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 9 | firefox +2 | 128.3.0-1.0.1.el9_4 | ELSA-2024-7552, ELSA-2024-7505 |
| Oracle Linux 8 | firefox +1 | 128.3.0-1.0.1.el8_10 | ELSA-2024-7700, ELSA-2024-7699 |
| Oracle Linux 7 | firefox | 128.3.0-1.0.1.el7_9 | ELSA-2024-7702 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 136.0.2-r0 | — |
Advisories 45
- ALSA-2024:7699 Important: thunderbird security update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2024:7700 Important: firefox security update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2024:7552 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2024:7505 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 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
- RHSA-2024:8166 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jun 30, 2026
- USN-7056-1 firefox vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- RHSA-2024:8169 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:7855 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:7856 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:7853 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:7854 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:7699 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:7505 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- RHSA-2024:7552 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Apr 23, 2026
- DSA-5789-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-5783-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3916-1 thunderbird - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-3913-1 firefox-esr - security update Debian Security (DSA / DLA) · Mar 9, 2026
- RLSA-2024:7699 Important: thunderbird security update Rocky Linux Security Advisories · Feb 5, 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-2024:14385-1 MozillaFirefox-131.0-1.1 on GA media 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
- ALAS2-2024-2690 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Nov 15, 2024
- 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
- ELSA-2024-7699 Important: thunderbird security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Oct 7, 2024
- ELSA-2024-7552 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 3, 2024
- NCSC-2024-0387 Kwetsbaarheden verholpen in Mozilla Firefox en Thunderbird NCSC-NL (Netherlands) · Oct 2, 2024
- ELSA-2024-7505 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Oct 2, 2024
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1918874
- https://www.mozilla.org/security/advisories/mfsa2024-46/
- https://www.mozilla.org/security/advisories/mfsa2024-47/
- https://www.mozilla.org/security/advisories/mfsa2024-48/
- https://www.mozilla.org/security/advisories/mfsa2024-49/
- https://www.mozilla.org/security/advisories/mfsa2024-50/