CVE-2026-118179: Mozilla Thunderbird · Links in Request Forgery via News
Affects Mozilla ThunderbirdSource CVE Database V5
Not known to be exploited · fixed in 153.6 : update Mozilla Thunderbird when convenient.
Data as of 27 Oct 2026, 18:57 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- Patch
- Available – fixed in 153.6
Exploitation evidence
Disclosed: evidence found.
CVE published 27 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
This vulnerability has been fixed in Thunderbird version 159. Users and administrators should update to Thunderbird 159 or later to remediate this issue. No additional mitigation steps are required once the update is applied.
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.