i18next is a language translation framework. Because of how the interpolation is implemented, making replacements from the dictionary one at a time, untrusted user input can use the name of one of the dictionary keys to inject script into the browser. This affects i18next <=1.10.2.
Severity
CVSS 3.0
6.1 medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
0.8% chance of exploitation in the next 30 days; higher than 58% of CVEs (scores of 2026-10-31)