thunderbird: Clicking a news: or snews: link that referenced a message-ID made Thunderbird connect, without asking, to the host an...
CVE-2026-118179 is fixed in thunderbird on 1 platform, first by DEBIAN-CVE-2026-118179, released October 31, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| thunderbird · Debian 12.15 (bookworm) | 1:153.6.0esr-1~deb12u2 | DEBIAN-CVE-2026-118179 | Oct 31, 2026 |
| thunderbird · Debian 13.5 (trixie) | 1:153.6.0esr-1~deb13u1 | DEBIAN-CVE-2026-118179 | Oct 31, 2026 |
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