9.8
Critical
CVE-2026-84637 Malicious calendar invitations could use file URI attachments to launch local or network-hosted executables on…
Description
Malicious calendar invitations could use file URI attachments to launch local or network-hosted executables on Windows, bypassing Thunderbird's normal executable attachment protections. With the new invitation display enabled, the attachment could also appear under a misleading filename. This vulnerability was fixed in Thunderbird 154 and Thunderbird 153.2.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Thunderbird 154 | earliest → < 154 | 154 |
| Thunderbird 153.2 | earliest → < 153.2 | 153.2 |
References
- bugzilla.mozilla.org bugzilla.mozilla.org
- www.mozilla.org www.mozilla.org
- www.mozilla.org www.mozilla.org
Timeline
- Published
- Last modified
Other CVEs of Thunderbird
The 1713 CVEs of Thunderbird →
CVE-2026-118180
Matrix homeserver could redirect the chat session to a local file or network share
7.5
High
CVE-2026-118179
Request forgery via news: links
8.8
High
CVE-2026-118178
RSS feed could redirect its subscription to a local file or network share
5.7
Medium
CVE-2026-118177
Calendar discovery accepted local file and remote network share locations
9.1
Critical