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CVE-2026-84642highCWE-1333

Allowed UNC hostnames for attachments interpreted as a regular expression

21Vexday Risk Score

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

ssvc Trackcvss 7.5epss 0.3%
probabilidade de exploração
0.3%top 83% das CVEs
exploração observada
nãonenhuma fonte reporta
The values of the mail.allowed_attachment_hostnames advanced config setting were used in a regular expression without escaping. For some possible valid hostnames, this could allow certain unintended hostnames to also match and serve remote attachments. This vulnerability was fixed in Thunderbird 155 and Thunderbird 153.2.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Produtos afetados
Mozilla · Thunderbird