Debian/thunderbird: critical 9.6
Sandbox escape, site isolation issue due to incorrect boundary conditions, use-after-free in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158,
Action: Upgrade thunderbird to 1:153.5.1esr-1~deb12u1 or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 1:153.5.1esr-1~deb12u1 | - |
Fixed versions
| 1:153.5.1esr-1~deb12u1 |
Sources
- osv: DEBIAN-CVE-2026-109705#Debian:12/thunderbird
- https://security-tracker.debian.org/tracker/CVE-2026-109705
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