FKIE_CVE-2026-1529

Vulnerability from fkie_nvd - Published: 2026-02-09 20:15 - Updated: 2026-02-10 02:15
Severity ?
8.1 (High) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Summary
A flaw was found in Keycloak. An attacker can exploit this vulnerability by modifying the organization ID and target email within a legitimate invitation token's JSON Web Token (JWT) payload. This lack of cryptographic signature verification allows the attacker to successfully self-register into an unauthorized organization, leading to unauthorized access.
References
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:2363
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:2364
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:2365
secalert@redhat.comhttps://access.redhat.com/errata/RHSA-2026:2366
secalert@redhat.comhttps://access.redhat.com/security/cve/CVE-2026-1529
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2433783
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A flaw was found in Keycloak. An attacker can exploit this vulnerability by modifying the organization ID and target email within a legitimate invitation token\u0027s JSON Web Token (JWT) payload. This lack of cryptographic signature verification allows the attacker to successfully self-register into an unauthorized organization, leading to unauthorized access."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una falla en Keycloak. Un atacante puede explotar esta vulnerabilidad modificando el ID de la organizaci\u00f3n y el correo electr\u00f3nico de destino dentro de la carga \u00fatil (payload) de un JSON Web Token (JWT) de un token de invitaci\u00f3n leg\u00edtimo. Esta falta de verificaci\u00f3n de firma criptogr\u00e1fica permite al atacante registrarse exitosamente en una organizaci\u00f3n no autorizada, lo que lleva a un acceso no autorizado."
    }
  ],
  "id": "CVE-2026-1529",
  "lastModified": "2026-02-10T02:15:52.253",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 5.2,
        "source": "secalert@redhat.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-02-09T20:15:55.883",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:2363"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:2364"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:2365"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/errata/RHSA-2026:2366"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://access.redhat.com/security/cve/CVE-2026-1529"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2433783"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-347"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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