Debian/thunderbird: high 8.8
Use-after-free in the Networking: HTTP component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Firefox ESR 115.37, Thunderbird 152, and Thunderbird 140.12.
Action: Upgrade thunderbird to 1:140.12.0esr-1 or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 1:140.12.0esr-1 | - |
Fixed versions
| 1:140.12.0esr-1 |
Sources
- osv: DEBIAN-CVE-2026-12291#Debian:14/thunderbird
- https://security-tracker.debian.org/tracker/CVE-2026-12291
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