CVE-2026-9802

[CVE catalog]

Severity

Medium · CVSS 6.8CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Published

May 27, 2026, 10:00:00 PM UTC

Source

[NVD] · [CVE record]

EPSS

0.30% · Oct 25, 2026

A flaw was found in Keycloak. When revokeRefreshToken=true is enabled and persistent session storage is in use, a server restart can reset internal timing mechanisms. This allows a remote attacker, who has previously captured a user's refresh token, to replay that token even after it has been revoked. Successful exploitation grants the attacker unauthorized access to the victim's account, potentially leading to information disclosure or privilege escalation. keycloak: Keycloak: Unauthorized account access via replayed refresh tokens after cluster restart A flaw in Keycloak, when configured with `revokeRefreshToken=true` and persistent session storage, allows a remote attacker to regain unauthorized access. Following a full cluster restart, a previously revoked refresh token, if captured by an attacker, can be replayed to bypass security checks. This could lead to unauthorized account access, potentially resulting in information disclosure or privilege escalation. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.