Description
Same-origin policy bypass in the Audio/Video: Playback component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | — | 140.14 |
| Mozilla | Thunderbird | — | 140.14 |
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 | 140.14.0esr-2 | — |
| Debian 14 | thunderbird | 1:140.14.0esr-1 | — |
| Debian 13 | firefox-esr | 140.14.0esr-1~deb13u1 | — |
| Debian 13 | thunderbird | 1:140.14.0esr-1~deb13u1 | — |
| Debian 12 | firefox-esr | 140.14.0esr-1~deb12u1 | — |
| Debian 12 | thunderbird | 1:140.14.0esr-1~deb12u1 | — |
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 | firefox | 140.14.0-1.el10_2 | RHSA-2026:58899 |
| RHEL 9 | firefox +1 | 140.14.0-1.el9_8 | RHSA-2026:58897 |
| RHEL 8 | firefox +1 | 140.14.0-1.el8_10 | RHSA-2026:65160, RHSA-2026:58898 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | firefox | 140.14.0-1.el10_0 | RHSA-2026:64813 |
| RHEL 9.6 EUS | firefox +1 | 140.14.0-1.el9_6 | RHSA-2026:65103 |
| RHEL 9.4 E4S | firefox +1 | 140.14.0-1.el9_4 | RHSA-2026:65105 |
| RHEL 9.2 E4S | firefox +1 | 140.14.0-1.el9_2 | RHSA-2026:65888 |
| RHEL 8.8 TUS | firefox +1 | 140.14.0-1.el8_8 | RHSA-2026:65765, RHSA-2026:64814 |
| RHEL 8.8 E4S | firefox +1 | 140.14.0-1.el8_8 | RHSA-2026:65765, RHSA-2026:64814 |
| RHEL 8.6 EUS Long Life | firefox +1 | 140.14.0-1.el8_6 | RHSA-2026:65757, RHSA-2026:65110 |
| RHEL 8.6 AUS | firefox +1 | 140.14.0-1.el8_6 | RHSA-2026:65757, RHSA-2026:65110 |
| RHEL 8.4 EUS Long Life | firefox +1 | 140.14.0-1.el8_4 | RHSA-2026:65764, RHSA-2026:65111 |
| RHEL 8.4 AUS | firefox +1 | 140.14.0-1.el8_4 | RHSA-2026:65764, RHSA-2026:65111 |
| RHEL 7 ELS | firefox | 140.14.0-1.el7_9 | RHSA-2026:65442 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | firefox | 140.14.0-1.el10_2 | ALSA-2026:58899 |
| AlmaLinux 9 | firefox +1 | 140.14.0-1.el9_8.alma.1 | ALSA-2026:58897 |
| AlmaLinux 8 | firefox +1 | 140.14.0-1.el8_10.alma.1 | ALSA-2026:65160, ALSA-2026:58898 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | firefox | 140.14.0-1.el10_2 | RLSA-2026:58899 |
| Rocky Linux 9 | firefox | 140.14.0-1.el9_8 | RLSA-2026:58897 |
| Rocky Linux 8 | firefox +1 | 140.14.0-1.el8_10 | RLSA-2026:65160, RLSA-2026:58898 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | MozillaFirefox | 140.14.0-150200.152.251.1 | SUSE-SU-2026:4156-1, SUSE-SU-2026:3658-1 |
| SLES 15 SP7 | MozillaFirefox-branding-SLE | 153-150400.14.3.1 | SUSE-SU-2026:4156-1 |
| SLES 15 SP7 | MozillaThunderbird | 140.14.0-150200.8.283.1 | SUSE-SU-2026:4268-1, SUSE-SU-2026:3897-1 |
| SLES 15 SP7 | mozilla-nspr | 4.39-150400.12.3.1 | SUSE-SU-2026:4156-1 |
| SLES 15 SP7 | mozilla-nss | 3.125-150400.3.74.1 | SUSE-SU-2026:4156-1 |
| SLES 15 SP6 | MozillaFirefox | 140.14.0-150200.152.251.1 | SUSE-SU-2026:4156-1, SUSE-SU-2026:3658-1 |
| SLES 15 SP6 | MozillaFirefox-branding-SLE | 153-150400.14.3.1 | SUSE-SU-2026:4156-1 |
| SLES 15 SP6 | mozilla-nspr | 4.39-150400.12.3.1 | SUSE-SU-2026:4156-1 |
| SLES 15 SP6 | mozilla-nss | 3.125-150400.3.74.1 | SUSE-SU-2026:4156-1 |
| SLES 15 SP5 | MozillaFirefox | 140.14.0-150200.152.251.1 | SUSE-SU-2026:4156-1, SUSE-SU-2026:3658-1 |
| SLES 15 SP5 | MozillaFirefox-branding-SLE | 153-150400.14.3.1 | SUSE-SU-2026:4156-1 |
| SLES 15 SP5 | mozilla-nspr | 4.39-150400.12.3.1 | SUSE-SU-2026:4156-1 |
| SLES 15 SP5 | mozilla-nss | 3.125-150400.3.74.1 | SUSE-SU-2026:4156-1 |
| SLES 15 SP4 | MozillaFirefox | 140.14.0-150200.152.251.1 | SUSE-SU-2026:4156-1, SUSE-SU-2026:3658-1 |
| SLES 15 SP4 | MozillaFirefox-branding-SLE | 153-150400.14.3.1 | SUSE-SU-2026:4156-1 |
| SLES 15 SP4 | mozilla-nspr | 4.39-150400.12.3.1 | SUSE-SU-2026:4156-1 |
| SLES 15 SP4 | mozilla-nss | 3.125-150400.3.74.1 | SUSE-SU-2026:4156-1 |
| SLES 12 SP5 | MozillaFirefox | 140.14.0-112.327.1 | SUSE-SU-2026:4140-1, SUSE-SU-2026:3683-1 |
| SLES 12 SP5 | MozillaFirefox-branding-SLE | 153-41.3.8 | SUSE-SU-2026:4140-1 |
| SLES 12 SP5 | mozilla-nspr | 4.39-19.39.1 | SUSE-SU-2026:4140-1 |
| SLES 12 SP5 | mozilla-nss | 3.125-58.147.1 | SUSE-SU-2026:4140-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | MozillaFirefox | 140.14.0-160000.1.1 | SUSE-SU-2026:23590-1, SUSE-SU-2026:23304-1 |
| SLES for SAP 16.0 | MozillaFirefox-branding-SLE | 153-160000.1.1 | SUSE-SU-2026:23590-1 |
| SLES for SAP 16.0 | mozilla-nspr | 4.39-160000.1.1 | SUSE-SU-2026:23590-1 |
| SLES for SAP 16.0 | mozilla-nss | 3.125-160000.1.1 | SUSE-SU-2026:23590-1 |
| SLES for SAP 16.0 | rust-cbindgen | 0.29.4+git0-160000.1.1 | SUSE-SU-2026:23590-1 |
| SLES for SAP 15 SP6 | MozillaFirefox | 140.14.0-150200.152.251.1 | SUSE-SU-2026:4156-1, SUSE-SU-2026:3658-1 |
| SLES for SAP 15 SP6 | MozillaFirefox-branding-SLE | 153-150400.14.3.1 | SUSE-SU-2026:4156-1 |
| SLES for SAP 15 SP6 | mozilla-nspr | 4.39-150400.12.3.1 | SUSE-SU-2026:4156-1 |
| SLES for SAP 15 SP6 | mozilla-nss | 3.125-150400.3.74.1 | SUSE-SU-2026:4156-1 |
| SLES for SAP 15 SP5 | MozillaFirefox | 140.14.0-150200.152.251.1 | SUSE-SU-2026:4156-1, SUSE-SU-2026:3658-1 |
| SLES for SAP 15 SP5 | MozillaFirefox-branding-SLE | 153-150400.14.3.1 | SUSE-SU-2026:4156-1 |
| SLES for SAP 15 SP5 | mozilla-nspr | 4.39-150400.12.3.1 | SUSE-SU-2026:4156-1 |
| SLES for SAP 15 SP5 | mozilla-nss | 3.125-150400.3.74.1 | SUSE-SU-2026:4156-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 140.14.0-150200.152.251.1 | SUSE-SU-2026:4156-1, SUSE-SU-2026:3658-1 |
| SLES for SAP 15 SP4 | MozillaFirefox-branding-SLE | 153-150400.14.3.1 | SUSE-SU-2026:4156-1 |
| SLES for SAP 15 SP4 | mozilla-nspr | 4.39-150400.12.3.1 | SUSE-SU-2026:4156-1 |
| SLES for SAP 15 SP4 | mozilla-nss | 3.125-150400.3.74.1 | SUSE-SU-2026:4156-1 |
| SLES 16.0 | MozillaFirefox | 140.14.0-160000.1.1 | SUSE-SU-2026:23590-1, SUSE-SU-2026:23304-1 |
| SLES 16.0 | MozillaFirefox-branding-SLE | 153-160000.1.1 | SUSE-SU-2026:23590-1 |
| SLES 16.0 | mozilla-nspr | 4.39-160000.1.1 | SUSE-SU-2026:23590-1 |
| SLES 16.0 | mozilla-nss | 3.125-160000.1.1 | SUSE-SU-2026:23590-1 |
| SLES 16.0 | rust-cbindgen | 0.29.4+git0-160000.1.1 | SUSE-SU-2026:23590-1 |
| SLE Micro 6.2 | mozilla-nspr | 4.39-160000.1.1 | SUSE-SU-2026:23411-1 |
| SLE Micro 6.2 | mozilla-nss | 3.125-160000.1.1 | SUSE-SU-2026:23411-1 |
| SLE Micro 5.5 | mozilla-nspr | 4.39-150400.12.3.1 | SUSE-SU-2026:4156-1 |
| SLE Micro 5.5 | mozilla-nss | 3.125-150400.3.74.1 | SUSE-SU-2026:4156-1 |
| SLE Micro 5.4 | mozilla-nspr | 4.39-150400.12.3.1 | SUSE-SU-2026:4156-1 |
| SLE Micro 5.4 | mozilla-nss | 3.125-150400.3.74.1 | SUSE-SU-2026:4156-1 |
| SLE Micro 5.3 | mozilla-nspr | 4.39-150400.12.3.1 | SUSE-SU-2026:4156-1 |
| SLE Micro 5.3 | mozilla-nss | 3.125-150400.3.74.1 | SUSE-SU-2026:4156-1 |
| SLE HPC 15 SP5 | MozillaFirefox | 140.14.0-150200.152.251.1 | SUSE-SU-2026:4156-1, SUSE-SU-2026:3658-1 |
| SLE HPC 15 SP5 | MozillaFirefox-branding-SLE | 153-150400.14.3.1 | SUSE-SU-2026:4156-1 |
| SLE HPC 15 SP5 | mozilla-nspr | 4.39-150400.12.3.1 | SUSE-SU-2026:4156-1 |
| SLE HPC 15 SP5 | mozilla-nss | 3.125-150400.3.74.1 | SUSE-SU-2026:4156-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 140.14.0-150200.152.251.1 | SUSE-SU-2026:4156-1, SUSE-SU-2026:3658-1 |
| SLE HPC 15 SP4 | MozillaFirefox-branding-SLE | 153-150400.14.3.1 | SUSE-SU-2026:4156-1 |
| SLE HPC 15 SP4 | mozilla-nspr | 4.39-150400.12.3.1 | SUSE-SU-2026:4156-1 |
| SLE HPC 15 SP4 | mozilla-nss | 3.125-150400.3.74.1 | SUSE-SU-2026:4156-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 154.0-1.1 | openSUSE-SU-2026:11580-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 140.14.0-1.1 | openSUSE-SU-2026:11558-1 |
| openSUSE Tumbleweed | firefox-esr | 153.1.0-1.1 | openSUSE-SU-2026:11546-1 |
| openSUSE Leap 16.0 | MozillaFirefox | 140.14.0-160000.1.1 | openSUSE-SU-2026:21713-1, openSUSE-SU-2026:21594-1 |
| openSUSE Leap 16.0 | mozilla-nspr | 4.39-160000.1.1 | openSUSE-SU-2026:21713-1 |
| openSUSE Leap 16.0 | mozilla-nss | 3.125-160000.1.1 | openSUSE-SU-2026:21713-1 |
| openSUSE Leap 16.0 | rust-cbindgen | 0.29.4+git0-160000.1.1 | openSUSE-SU-2026:21713-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | firefox | 140.14.0-1.amzn2023.0.1 | ALAS2023-2026-2105 |
| Amazon Linux 2 | thunderbird | 140.14.0-1.amzn2.0.1 | ALAS2-2026-3880 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | firefox | 140.14.0-1.0.1.el10_2 | ELSA-2026-58899 |
| Oracle Linux 9 | firefox +1 | 140.14.0-1.0.1.el9_8 | ELSA-2026-58897 |
| Oracle Linux 8 | firefox | 140.14.0-1.0.1.el8_10 | ELSA-2026-58898 |
Advisories 43
- WID-SEC-2026-2911 Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 8, 2026
- ALSA-2026:58897 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:58899 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:65160 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:58898 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- SUSE-SU-2026:23590-1 Security update for MozillaFirefox, mozilla-nss, mozilla-nspr, rust-cbindgen SUSE / openSUSE Security Updates · Sep 29, 2026
- SUSE-SU-2026:4140-1 Security update for MozillaFirefox, mozilla-nspr, mozilla-nss, rust-cbindgen SUSE / openSUSE Security Updates · Sep 28, 2026
- SUSE-SU-2026:4268-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Sep 19, 2026
- SUSE-SU-2026:4156-1 Security update for MozillaFirefox, MozillaFirefox-branding-SLE, mozilla-nspr, mozilla-nss, rust-cbindgen SUSE / openSUSE Security Updates · Sep 15, 2026
- RHSA-2026:65888 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2026:65765 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2026:65764 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2026:65757 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2026:65442 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2026:65111 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2026:65105 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2026:65110 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2026:65103 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2026:64814 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- RHSA-2026:64813 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 15, 2026
- SUSE-SU-2026:3897-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Sep 10, 2026
- SUSE-SU-2026:23411-1 Security update for MozillaFirefox, mozilla-nss, mozilla-nspr, rust-cbindgen SUSE / openSUSE Security Updates · Sep 10, 2026
- SUSE-SU-2026:23304-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Sep 10, 2026
- RHSA-2026:65160 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Sep 10, 2026
- RHSA-2026:58899 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 10, 2026
- RHSA-2026:58898 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 10, 2026
- RHSA-2026:58897 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Sep 10, 2026
- RLSA-2026:65160 Important: thunderbird security update Rocky Linux Security Advisories · Sep 9, 2026
- openSUSE-SU-2026:21713-1 Security update for MozillaFirefox, mozilla-nss, mozilla-nspr, rust-cbindgen SUSE / openSUSE Security Updates · Sep 2, 2026
- ALAS2-2026-3880 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 31, 2026
- ALAS2023-2026-2105 Important: firefox security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Aug 31, 2026
- SUSE-SU-2026:3683-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Aug 26, 2026
- RLSA-2026:58899 Important: firefox security update Rocky Linux Security Advisories · Aug 26, 2026
- RLSA-2026:58897 Important: firefox security update Rocky Linux Security Advisories · Aug 26, 2026
- RLSA-2026:58898 Important: firefox security update Rocky Linux Security Advisories · Aug 26, 2026
- openSUSE-SU-2026:11580-1 MozillaFirefox-154.0-1.1 on GA media SUSE / openSUSE Security Updates · Aug 24, 2026
- ELSA-2026-58899 Important: firefox security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Aug 24, 2026
- ELSA-2026-58897 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Aug 24, 2026
- ELSA-2026-58898 Important: firefox security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Aug 24, 2026
- openSUSE-SU-2026:11546-1 firefox-esr-153.1.0-1.1 on GA media SUSE / openSUSE Security Updates · Aug 21, 2026
- openSUSE-SU-2026:21594-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Aug 21, 2026
- openSUSE-SU-2026:11558-1 MozillaThunderbird-140.14.0-1.1 on GA media SUSE / openSUSE Security Updates · Aug 21, 2026
- SUSE-SU-2026:3658-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Aug 21, 2026
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2055697
- https://www.mozilla.org/security/advisories/mfsa2026-74/
- https://www.mozilla.org/security/advisories/mfsa2026-76/
- https://www.mozilla.org/security/advisories/mfsa2026-77/
- https://www.mozilla.org/security/advisories/mfsa2026-78/
- https://www.mozilla.org/security/advisories/mfsa2026-79/
- https://www.mozilla.org/security/advisories/mfsa2026-80/