Description
Spoofing issue in the Address Bar component. This vulnerability was fixed in Firefox 142 and Firefox ESR 140.2.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | — | 140.2 |
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.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLES 15 SP6 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLES 15 SP5 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLES 15 SP4 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLES 15 SP3 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP5 | MozillaFirefox | 140.2.0-112.276.1 | SUSE-SU-2025:03009-1 |
| SLES for SAP 15 SP5 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLES for SAP 15 SP4 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLES for SAP 15 SP3 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLE HPC 15 SP5 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLE HPC 15 SP4 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SLE HPC 15 SP3 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
| SUSE Enterprise Storage 7.1 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 142.0.1-1.1 | openSUSE-SU-2025:15516-1 |
| openSUSE Tumbleweed | firefox-esr | 140.2.0-1.1 | openSUSE-SU-2025:15467-1 |
| openSUSE Leap 15.6 | MozillaFirefox | 140.2.0-150200.152.198.1 | SUSE-SU-2025:03008-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | firefox | 140.2.0-1.amzn2023.0.1 | ALAS2023-2025-1171 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 140.2-r0 | — |
Advisories 6
- WID-SEC-2025-1866 Mozilla Firefox und Thunderbird: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 15, 2026
- openSUSE-SU-2025:15516-1 MozillaFirefox-142.0.1-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- openSUSE-SU-2025:15467-1 firefox-esr-140.2.0-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- SUSE-SU-2025:03009-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2025:03008-1 Security update for MozillaFirefox SUSE / openSUSE Security Updates · Feb 4, 2026
- ALAS2023-2025-1171 Important: firefox security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Sep 8, 2025