CVE-2026-92038 — Firefox — Fixed in 156; Firefox ESR — Fixed in 153.3; Thunderbird — Fixed in 156 / 153.3
Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.
Fixed versions
Choose the version for your installed product and release branch.
| Product | Fixed versions |
|---|---|
| Firefox | 156 |
| Firefox ESR | 153.3 |
| Thunderbird | 156 / 153.3 |
CVSS score9.1 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NWeakness type (CWE)CWE-693
Vendorsmozilla
Affected products
| Vendors | Product | Versions |
|---|---|---|
| mozilla | firefox | < 153.3.0 |
| mozilla | thunderbird | < 153.3.0 |
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