[NEW] [UNPATCHED] [medium] Keycloak: Vulnerability allows information disclosure

mediumCVE-2026-15945

A remote, authenticated attacker can exploit a vulnerability in Keycloak to disclose information.

CSIRTS triage

vendor: Keycloak product: Keycloak Information disclosure

What: A vulnerability allows a remote, authenticated attacker to disclose information.
Who is affected: Authenticated users of Keycloak are affected.
Urgency: Remediation is medium urgency as it allows information disclosure but is not currently exploited.
Action: Apply the patch for CVE-2026-15945 to fix the vulnerability.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source: CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity: medium
Published: 2026-07-17
Exploitation: Not in CISA KEV at last sync
Language: Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2389

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-2026-159450.19% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 9% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-15945	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

mediumCVE-2026-15945: A flaw was found in the group search functionality of the Keycloak server's administrative API…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.

mediumCVE-2026-18573: A flaw was found in the keycloak-services component of Keycloak, which is used for managing au…nvd · 2026-08-02
mediumCVE-2026-18572: Keycloak provides authorization services that allow administrators to restrict access to resou…nvd · 2026-08-02
mediumCVE-2026-18571: A flaw was found in the user creation component of Keycloak when Fine-Grained Admin Permission…nvd · 2026-08-02
mediumCVE-2026-18570: A flaw was found in the full-scope-disabled client-policy executor within the keycloak-service…nvd · 2026-08-02
mediumCVE-2026-18218: A flaw was found in the TokenManager component of the Keycloak identity management service. Wh…nvd · 2026-07-31
lowCVE-2026-18217: A flaw was found in the SAML protocol implementation of Keycloak, an open-source identity and …nvd · 2026-07-31