CVE-2026-74938criticalCWE-693

CVE-2026-74938: falha crítica em Mozilla Firefox

Mitigation bypass in the JavaScript: GC component

Publicada em 18 ago 2026

Seguir esta CVE + Monitorar Firefox + Monitorar Thunderbird

Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.

28Vexday Risk Score

Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.

ssvc Trackcvss 9.1epss 0.4%

Mitigation bypass in the JavaScript: GC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Produtos afetados

Mozilla · Firefox Mozilla · Thunderbird

CVEs relacionadas — Mozilla Firefox

No mesmo produto, das mais perigosas para as menos.

CVE-2016-9079HIGHCVE-2016-9079EPSS 87.4%KEV CVE-2019-11708CRITICALCVE-2019-11708EPSS 55.9%KEV CVE-2019-17026HIGHCVE-2019-17026EPSS 46.3%KEV CVE-2019-11707HIGHCVE-2019-11707EPSS 38.0%KEV CVE-2024-9680CRITICALCVE-2024-9680EPSS 23.2%KEV CVE-2022-26485HIGHCVE-2022-26485EPSS 14.3%KEV

Referências

https://bugzilla.mozilla.org/show_bug.cgi?id=2053688 https://www.mozilla.org/security/advisories/mfsa2026-74/https://www.mozilla.org/security/advisories/mfsa2026-77/https://www.mozilla.org/security/advisories/mfsa2026-78/https://www.mozilla.org/security/advisories/mfsa2026-80/