The emoji field in the page emoji update endpoint does not properly validate user input. By injecting long text and line breaks, the sidebar layout becomes broken and can hide other items.
https://hackerone.com/reports/3599470
Source: Mitre, NVD
Published: 2026-09-21
Updated: 2026-09-22
Base Score: 3.3
Vector: CVSS2#AV:N/AC:L/Au:M/C:N/I:P/A:N
Severity: Low
Base Score: 2.4
Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N
EPSS: 0.00188