Description
Sandbox escape in the XUL component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | — | 153.4 |
| Mozilla | Thunderbird | — | 153.4 |
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 | 153.4.0esr-1 | — |
| Debian 14 | thunderbird | 1:153.4.0esr-1 | — |
| Debian 13 | firefox-esr | 153.4.0esr-1~deb13u1 | — |
| Debian 12 | firefox-esr | 153.4.0esr-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 | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | MozillaFirefox | 153.4.0-150400.157.11.1 | SUSE-SU-2026:4545-1 |
| SLES 15 SP7 | MozillaThunderbird | 153.4.0-150400.13.6.1 | SUSE-SU-2026:4627-1 |
| SLES 15 SP6 | MozillaFirefox | 153.4.0-150400.157.11.1 | SUSE-SU-2026:4545-1 |
| SLES 15 SP5 | MozillaFirefox | 153.4.0-150400.157.11.1 | SUSE-SU-2026:4545-1 |
| SLES 15 SP4 | MozillaFirefox | 153.4.0-150400.157.11.1 | SUSE-SU-2026:4545-1 |
| SLES 12 SP5 | MozillaFirefox | 153.4.0-118.11.1 | SUSE-SU-2026:4543-1 |
Show 7 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | MozillaFirefox | 153.4.0-160000.1.1 | SUSE-SU-2026:23981-1 |
| SLES for SAP 15 SP6 | MozillaFirefox | 153.4.0-150400.157.11.1 | SUSE-SU-2026:4545-1 |
| SLES for SAP 15 SP5 | MozillaFirefox | 153.4.0-150400.157.11.1 | SUSE-SU-2026:4545-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 153.4.0-150400.157.11.1 | SUSE-SU-2026:4545-1 |
| SLES 16.0 | MozillaFirefox | 153.4.0-160000.1.1 | SUSE-SU-2026:23981-1 |
| SLE HPC 15 SP5 | MozillaFirefox | 153.4.0-150400.157.11.1 | SUSE-SU-2026:4545-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 153.4.0-150400.157.11.1 | SUSE-SU-2026:4545-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 157.0.1-1.1 | openSUSE-SU-2026:12097-1 |
| openSUSE Tumbleweed | firefox-esr +1 | 153.4.0-1.1 | openSUSE-SU-2026:12098-1, openSUSE-SU-2026:11917-1 |
| openSUSE Leap 16.0 | MozillaFirefox | 153.4.0-160000.1.1 | openSUSE-SU-2026:21980-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | firefox | 153.5.0-1.amzn2023.0.1 | ALAS2023-2026-3281 |
Advisories 10
- WID-SEC-2026-3654 Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- ALAS2023-2026-3281 Important: firefox security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Oct 26, 2026
- SUSE-SU-2026:4627-1 Security update for MozillaThunderbird SUSE / openSUSE Security Updates · Oct 13, 2026
- openSUSE-SU-2026:12098-1 MozillaThunderbird-153.4.0-1.1 on GA media SUSE / openSUSE Security Updates · Oct 11, 2026
- openSUSE-SU-2026:12097-1 MozillaFirefox-157.0.1-1.1 on GA media SUSE / openSUSE Security Updates · Oct 11, 2026
- SUSE-SU-2026:4543-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Oct 7, 2026
- SUSE-SU-2026:4545-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Oct 7, 2026
- SUSE-SU-2026:23981-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Oct 6, 2026
- openSUSE-SU-2026:21980-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Oct 1, 2026
- openSUSE-SU-2026:11917-1 firefox-esr-153.4.0-1.1 on GA media SUSE / openSUSE Security Updates · Sep 30, 2026