CVE-2026-93999Network attack vectorHinoki check available

Authenticated access-control bypass via stale audience restoration

Published Sep 19, 2026 · Updated Sep 19, 2026

Missing authorization in Red Hat build of Keycloak allows remote authenticated users to retain access through disabled audience clients. Token refresh restores audience claims from stored client IDs without rechecking whether each target client remains enabled. Exploitation requires a previously issued refresh token and affects resources that accept the resulting JWT without online validation.

CVSS severity4.2
Medium
EPSS probability0.23%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in Red Hat build of Keycloak allows remote authenticated users to retain access through disabled audience clients. Token refresh restores audience claims from stored client IDs without rechecking whether each target client remains enabled. Exploitation requires a previously issued refresh token and affects resources that accept the resulting JWT without online validation.

The record

CVE
CVE-2026-93999
Published
Sep 19, 2026
Updated
Sep 19, 2026
Vendor
Commonhaus Foundation
Product
Red Hat build of Keycloak
Classifications
CWE-862, T1550.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Commonhaus Foundation · Red Hat build of KeycloakAffected versions are unavailable in this record.

Published CVSS scores

4.2Red HatCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1550.001Use Alternate Authentication Material: Application Access Token

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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