{"action":"Upgrade thunderbird to 1:128.10.0esr-1 or later.","affected":[{"fixed":"1:128.10.0esr-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1:128.10.0esr-1"],"id":"tcs_01M5NNBFPDS03CKA2PZHXBMYAF","modified_at":"2026-09-01T20:05:46.264296975Z","published_at":"2025-04-15T15:16:09.877Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2025-3522","https://security-tracker.debian.org/tracker/CVE-2025-3522"],"severity":{"label":"medium","score":6.3},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2025-3522#Debian:13/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2025-3522"}],"summary":"Thunderbird processes the X-Mozilla-External-Attachment-URL header to handle attachments which can be hosted externally. When an email is opened, Thunderbird accesses the specified URL to determine fi"}