Security readout for executives and security teams
Plain-English summary
Keycloak may continue exposing organization metadata after the Organizations feature is disabled. The issue requires an authenticated user who already has organization membership. Business risk is mainly incorrect downstream authorization if applications trust organization claims that should no longer be available.
Executive priority
Treat this as a moderate identity-platform fix. It is not described as actively exploited, but authorization decisions based on stale organization data can create business access-control risk across dependent applications.
Technical view
CVE-2026-9791 is a CWE-863 authorization flaw in Red Hat build of Keycloak. Account APIs and OIDC tokens requested with the organization scope can disclose organization metadata after the feature is disabled. CVSS is 4.3, with low confidentiality impact and no integrity or availability impact stated.
Likely exposure
Exposure is limited to Red Hat build of Keycloak 26.4 and 26.6 packages listed as affected, especially deployments using Organizations, account APIs, OIDC organization scope, or resource servers that authorize based on organization claims.
Exploitation context
The source bundle does not indicate active exploitation, and KEV is false. Abuse requires an authenticated user with existing organization membership. The main concern is data leakage in tokens or APIs and downstream services making authorization decisions from stale organization metadata.
Researcher notes
Focus assessment on affected RHBK 26.4 and 26.6 packages, organization membership state, token contents, and user-facing account APIs. Evidence supports confidentiality exposure and possible authorization side effects, but not broader product impact or public exploitation.
Mitigation direction
- Apply the relevant Red Hat errata for affected Keycloak 26.4 or 26.6 deployments.
- Upgrade to vendor-listed unaffected builds, such as 26.4.13 or 26.6.3 where applicable.
- Review resource servers that trust organization claims for authorization decisions.
- Check Red Hat guidance before relying on feature disablement as a compensating control.
Validation and detection
- Inventory Red Hat build of Keycloak versions and package names across environments.
- Confirm whether Organizations was enabled and later disabled in any realm.
- Review clients requesting the OIDC organization scope.
- Check whether account APIs expose organization metadata to authenticated members.
- Verify upgraded environments no longer disclose disabled organization metadata.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-863: Authorization and privilege behavior lookup
Authorization weaknesses can support privilege escalation and valid-account review, depending on exploit path. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCredential and access behavior lookup
The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-9791 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N2.81.4redhatVulnerability scoring details
Base CVSS 3.1 score
4.3MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- Source timelineredhat
Reported to Red Hat.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- Source timelineredhat
Made public.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- RHSA-2026:25097CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2026:25098CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2026:30049CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- RHSA-2026:30050CVE reference, redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-9791CVE reference, redhat · vdb-entry, x_refsource_REDHAT
- RHBZ#2482458CVE reference, redhat · issue-tracking, x_refsource_REDHAT
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Incorrect Authorization
Incorrect Authorization represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.