CVE-2026-56684

{
  "id": "CVE-2026-56684",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-18T15:16:55.463",
  "lastModified": "2026-10-22T22:10:00.250",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's tlsProcessPendingData function iterates pending_list while an authenticated client can trigger CLIENT KILL, causing connTLSClose to delete the iterator's cached next node and producing a use-after-free that can crash the server or potentially allow remote code execution when TLS is enabled. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1."
    },
    {
      "lang": "es",
      "value": "Valkey es una base de datos distribuida de clave-valor. Antes de 7.2.14, 8.0.10, 8.1.9, 9.0.5 y 9.1.1, la función tlsProcessPendingData de Valkey itera pending_list mientras un cliente autenticado puede activar CLIENT KILL, haciendo que connTLSClose elimine el siguiente nodo en caché del iterador y produciendo un uso después de liberación que puede bloquear el servidor o potencialmente permitir la ejecución remota de código cuando TLS está habilitado. Este problema está solucionado en las versiones 7.2.14, 8.0.10, 8.1.9, 9.0.5 y 9.1.1."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "valkey-io",
          "product": "valkey",
          "versions": [
            {
              "version": "< 7.2.14",
              "status": "affected"
            },
            {
              "version": ">= 8.0.0, < 8.0.10",
              "status": "affected"
            },
            {
              "version": ">= 8.1.0, < 8.1.9",
              "status": "affected"
            },
            {
              "version": ">= 9.0.0, < 9.0.5",
              "status": "affected"
            },
            {
              "version": ">= 9.1.0, < 9.1.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-18T00:00:00+00:00",
          "id": "CVE-2026-56684",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/valkey-io/valkey/pull/4234",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/valkey-io/valkey/releases/tag/7.2.14",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/valkey-io/valkey/releases/tag/8.0.10",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/valkey-io/valkey/releases/tag/8.1.9",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/valkey-io/valkey/releases/tag/9.0.5",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/valkey-io/valkey/releases/tag/9.1.1",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh",
      "source": "[email protected]"
    }
  ]
}