[UPDATE] [medium] Keycloak: Multiple vulnerabilities
A remote, authenticated attacker can exploit multiple vulnerabilities in Keycloak to obtain administrator rights, bypass security measures and disclose confidential information.
CSIRTS triage
- What
- Multiple vulnerabilities in Keycloak allow authenticated attackers to gain administrator rights, bypass security measures, and access confidential information.
- Who is affected
- All Keycloak deployments requiring authenticated access are affected.
- Urgency
- Medium severity requiring authentication but resulting in administrator privilege escalation and information access.
- Action
- Update Keycloak to the patched version and audit user accounts and permission changes.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2145
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-123880.23% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 14% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-142090.22% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 13% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-46290.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 25% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-12388 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-14209 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-4629 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- mediumCVE-2026-4629: A flaw was found in Keycloak. A highly privileged user with `manage-clients` permission can exp…nvd
- mediumCVE-2026-14209: A vulnerability was discovered in Keycloak's Admin UI extension that allows certain administra…nvd
- mediumCVE-2026-12388: A flaw was found in the Identity Provider (IdP) mapper component of Keycloak, which is used to…nvd
Recent advisories for Keycloak
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- high[NEW] [high] RedHat Build of Keycloak: Multiple Vulnerabilitiescert-bund · 2026-08-06
- medium[UPDATE] [medium] Keycloak (admin-ui-ext): Vulnerability allows file manipulationcert-bund · 2026-08-06
- medium[UPDATE] [medium] Keycloak: Multiple vulnerabilitiescert-bund · 2026-08-06
- medium[NEW] [UNPATCHED] [medium] Keycloak: Multiple vulnerabilitiescert-bund · 2026-08-06
- high[UPDATE] [high] Keycloak: Multiple vulnerabilitiescert-bund · 2026-08-06
- mediumCVE-2026-18967: A flaw was found in the SAML broker component of Keycloak, an identity and access management s…nvd · 2026-08-06
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