Description
Same-origin policy bypass in the Request Handling component. This vulnerability was fixed in Firefox 146, Firefox ESR 115.31, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
References (6)
Scores
CVSS v3
6.5
EPSS
0.0004
EPSS Percentile
13.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-346
Status
published
Products (9)
mozilla/firefox
< 115.31.0
mozilla/firefox
< 146.0
Mozilla/Firefox
115.31 - 115.*
Mozilla/Firefox
140.6 - 140.*
Mozilla/Firefox
146
mozilla/thunderbird
< 140.6.0
mozilla/thunderbird
< 146.0
Mozilla/Thunderbird
140.6 - 140.*
Mozilla/Thunderbird
146
Published
Dec 09, 2025
Tracked Since
Feb 18, 2026