Description
In certain cases, SNI could have been sent unencrypted even when encrypted DNS was enabled. This vulnerability was fixed in Firefox 139 and Thunderbird 139.
Scores
CVSS v3
7.5
EPSS
0.0017
EPSS Percentile
37.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-319
Status
published
Products (3)
mozilla/firefox
< 139.0
Mozilla/Firefox
139
Mozilla/Thunderbird
139
Published
May 27, 2025
Tracked Since
Feb 18, 2026