{"action":"Upgrade thunderbird to 1:78.10.0-1 or later.","affected":[{"fixed":"1:78.10.0-1","introduced":"0"}],"component":"thunderbird","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:13","exploited":false,"fixed_versions":["1:78.10.0-1"],"id":"tcs_01M5NFFG29ABRN6ZPKMN54P1QJ","modified_at":"2026-10-23T18:03:25.278274786Z","published_at":"2021-06-24T14:15:09.257Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2021-23993","https://security-tracker.debian.org/tracker/CVE-2021-23993"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2021-23993#Debian:13/thunderbird","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2021-23993"}],"summary":"An attacker may perform a DoS attack to prevent a user from sending encrypted email to a correspondent. If an attacker creates a crafted OpenPGP key with a subkey that has an invalid self signature, a"}