https://cve.radiocsirt.org/rss/recent/all/10 Most recent entries from all 2026-10-06T21:30:02.519091+00:00 Vulnerability-Lookup csirt@opendfir.org python-feedgen Contains only the most 10 recent entries. https://cve.radiocsirt.org/vuln/cve-2026-84642 CVE-2026-84642 — Allowed UNC hostnames for attachments interpreted as a regular expression 2026-10-06T21:30:02.534389+00:00

Affected: Mozilla Thunderbird

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.