CVE•Published 2026-05-28•Modified 2026-06-03•0 articles on news•5 live references•NVD data

CVE-2026-9796Redhat · Build_of_keycloak

Vulnerability data via NVD (ingested)

CVSS v3.1

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

EPSS percentile

—

Weaknesses (CWE)

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition

Description

A flaw was found in Keycloak. An authenticated administrator with the `manage-clients` role can exploit a Time-of-check to time-of-use (TOCTOU) vulnerability in the name-based admin role checks. This allows the attacker to escalate their privileges to `realm-admin` for all users within the realm, granting them extensive control over the system. The composite role relationship persists even after the attacker's own permissions are revoked and across system reboots.

Timeline

Published 2026-05-28

Modified 2026-06-03

External references

NVD MITRE Exploit-DB Sploitus VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2026-9796

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · product

product:"Redhat Build Of Keycloak"

All exposed Redhat Build Of Keycloak instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Build Of Keycloak"

HTTP body or banner mentions "Build Of Keycloak" — catches deploys Shodan didn't identify as a product.

More intel sources (5)

Shodan report

vuln:CVE-2026-9796