CVE-2026-9088: Keycloak: keycloak: information disclosure due to user profile permission bypass
Telemetry drift only. No threshold crossed and no authority ruling changed.
CVE record, CISA KEV and EPSS as of 2026-10-18.
CVEs like this one computed, by meaning
What to do now held facts and links
- No fix version is held. The CNA's first reference is the place to look: access.redhat.com
- Record your decision, dated and frozen with today's evidence: patch by a date · mitigated by a compensating control · deferred · accepted the risk · not affected
- Check your version against the ranges this record publishes.
What it is stated by the CNA
A flaw was found in org.keycloak.services. An administrator with delegated access to read group memberships and users can bypass user profile permissions by accessing the group members endpoint. This allows the administrator to view user attributes that are explicitly configured to be denied, leading to information disclosure.
- weakness
- CWE-1220 Insufficient Granularity of Access Control
- affected
- Red Hat build of Keycloak 26.4; Red Hat build of Keycloak 26.4.13; Red Hat build of Keycloak 26.6; Red Hat build of Keycloak 26.6.3
- versions
- No affected-version range in held sources.
- fixed in
- No fix version in held sources.
- fixed by package (from OSV advisories)
- org.keycloak:keycloak-services (Maven): 26.7.0 GHSA-6g26-7cx5-mrrg
- later fixes (from OSV advisories)
- keycloak-services 26.7.0 is inside a range CVE-2026-18963 (GHSA-4gv3-mc9p-5wqc) lists as affected. That advisory is fixed in 26.7.2.
- severity
- 2.7 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N
- assigned by
- redhat
- published
- 2026-06-05
check us access.redhat.com access.redhat.com access.redhat.com access.redhat.com
Exploit code held, dated
- exploit code
- None held in the PoC-in-GitHub feed. A public repository changes this brief.
What moved held, dated
| date | EPSS | event |
|---|---|---|
| 5 Jun 2026 | 0.00007 | |
| 7 Jun 2026 | 0.00006 | |
| 11 Jun 2026 | 0.00008 | |
| 15 Jun 2026 | 0.00318 | scoring model v2026.06.15 |
| 26 Jun 2026 | 0.00348 | |
| 28 Sep 2026 | 0.0045 |
6 observations held. A step marked with a scoring model moved because the measurement was replaced, not because the vulnerability changed.
Outside the record researched, cited
This section reads the record's references and adds cited findings from outside it. It needs an account. Everything above is held facts and is complete without it.
What would change this brief held, dated
- CISA KEV
- Not listed in the catalogue we hold. A listing changes this brief.
- exploit probability
- 0.00 on 2026-09-28 (FIRST's EPSS, a probability and not evidence of exploitation). Next band line: 10% (0.10). Crossing a line changes this brief.
- fix
- No fix version is held. One published by the CNA or OSV changes this brief.
How to check this
Every value above is held with two dates: when it was true upstream (as_of) and when we recorded it (tx_from). Re-derive the exploit probability as it stood on any date:
SELECT value, source, source_version, as_of, tx_from
FROM volatile_valid_as_of('CVE-2026-9088', '2026-10-30T23:59:59.999999Z', now());