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CVE-2026-5731

CRITICAL

9.8

Descricao

Memory safety bugs present in Firefox ESR 115.34.0, Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1 and Thunderbird 149.0.1. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 149.0.2, Firefox ESR < 115.34.1, Firefox ESR < 140.9.1, Thunderbird < 149.0.2, and Thunderbird < 140.9.1.

Detalhes CVE

Pontuacao CVSS v3.19.8

SeveridadeCRITICAL

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

Vetor de ataqueNETWORK

ComplexidadeLOW

Privilegios necessariosNONE

Interacao do usuarioNONE

Publicado4/7/2026

Ultima modificacao4/7/2026

Fontenvd

Avistamentos honeypot0

Fraquezas (CWE)

CWE-119

Referencias

https://bugzilla.mozilla.org/buglist.cgi?bug_id=2021894%2C2022225%2C2022252%2C2022294%2C2023007%2C2023130%2C2023191%2C2023364%2C2023829%2C2024074%2C2024417%2C2024433%2C2024436%2C2024437%2C2024453%2C2024461%2C2024462%2C2024472%2C2024474%2C2024477%2C2025364%2C2025401%2C2025402%2C2025472%2C2026287%2C2026299%2C2026305%2C2026426(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-25/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-26/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-27/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-28/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-29/(security@mozilla.org)

Correlacoes IOC

Sem correlacoes registradas

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