Debian/firefox-esr: medium 5.3
Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
Action: Upgrade firefox-esr to 140.12.0esr-1~deb13u1 or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 140.12.0esr-1~deb13u1 | - |
Fixed versions
| 140.12.0esr-1~deb13u1 |
Sources
- osv: DEBIAN-CVE-2026-12308#Debian:13/firefox-esr
- https://security-tracker.debian.org/tracker/CVE-2026-12308
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