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CVE-2026-1035

Estado: AplazadaBaja (3.1)—

A flaw was found in the Keycloak server during refresh token processing, specifically in the TokenManager class responsible for enforcing refresh token reuse policies. When strict refresh token rotation is enabled, the validation and update of refresh token usage are not performed atomically. This allows concurrent refresh requests to bypass single-use enforcement and issue multiple access tokens from the same refresh token. As a result, Keycloak’s refresh token rotation hardening can be undermined.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

CWE

Referencias

JSON original (NVD)

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          "options": [
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              "exploitation": "none"
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2026-01-21T14:37:07.867592Z"
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          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
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          "confidentialityImpact": "NONE"
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      "affectedData": [
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          "vendor": "Red Hat",
          "product": "Red Hat build of Keycloak 26.4",
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          "product": "Red Hat Single Sign-On 7",
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  "published": "2026-01-21T06:15:46.937",
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      "description": [
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      "value": "A flaw was found in the Keycloak server during refresh token processing, specifically in the TokenManager class responsible for enforcing refresh token reuse policies. When strict refresh token rotation is enabled, the validation and update of refresh token usage are not performed atomically. This allows concurrent refresh requests to bypass single-use enforcement and issue multiple access tokens from the same refresh token. As a result, Keycloak’s refresh token rotation hardening can be undermined."
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    }
  ],
  "lastModified": "2026-06-17T10:14:53.580",
  "sourceIdentifier": "secalert@redhat.com"
}