CVE-2026-107889
MEDIUM
MEDIUM
Priority: 0.02
BB Relevance:
56/100
Published: 2026-10-09
Modified: 2026-11-06
First seen: 2026-11-03
Status: active
Attack Surface
Network
Low Complexity
No Interaction
Scope Change
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
High
UI:
None
S:
Changed
C:
Low
I:
Low
A:
None
Description
A flaw was found in the login theme rendering component of Keycloak. The issue occurs because the security filter responsible for cleaning user input can be bypassed, allowing a realm administrator to store malicious scripts in display fields. This could result in unauthorized JavaScript execution in the browsers of users visiting the login page, potentially leading to data exposure or session interference.
Weakness Classification (1)
References & Advisories (4)
vendor-advisory
x_refsource_REDHAT
vendor-advisory
x_refsource_REDHAT
vdb-entry
x_refsource_REDHAT
issue-tracking
x_refsource_REDHAT