VULNERABILITY INTELLIGENCE
CVE-2026-118179
EPSS probability0.18%
CISA KEVNot currently listed
Published2026-10-27
Last modified2026-10-28
Description
Clicking a news: or snews: link that referenced a message-ID made Thunderbird connect, without asking, to the host and port given in the link, even if it was not a configured news server. Line breaks in the message-ID were sent to the server unmodified, so a crafted link could send arbitrary commands to services reachable from the user's network. In addition, snews: links to such servers connected without TLS. This vulnerability was fixed in Thunderbird 159 and Thunderbird 153.6.