Description
The client in Mumble 1.2.x before 1.2.6 allows remote attackers to force the loading of an external file and cause a denial of service (hang and resource consumption) via a crafted string that is treated as rich-text by a Qt widget, as demonstrated by the (1) user or (2) channel name in a Qt dialog, (3) subject common name or (4) email address to the Certificate Wizard, or (5) server name in a tooltip.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | mumble | 1.2.6-1 | — |
| Debian 13 | mumble | 1.2.6-1 | — |
| Debian 12 | mumble | 1.2.6-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | mumble | 1.2.4-0.2ubuntu1.1 | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | mumble | 1.2.17-1.2 | openSUSE-SU-2024:10080-1 |
Advisories 1
- openSUSE-SU-2024:10080-1 mumble-1.2.17-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026