FKIE_CVE-2026-59279

Vulnerability from fkie_nvd - Published: 2026-08-21 12:16 - Updated: 2026-10-16 15:10
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
The MCP Streamable HTTP server transport (WebFlux and WebMvc variants) does not place any limit on the number of sessions it retains, and by default does not require clients to be authenticated. As a result, a remote attacker can cause the server to accumulate an unbounded number of sessions over time, gradually exhausting available memory and ultimately causing a Denial of Service that affects all legitimate clients. Affected versions: Spring AI: 2.0.0
References
security@vmware.comhttps://spring.io/security/cve-2026-59279Vendor Advisory
Impacted products
Vendor Product Version
vmware spring_ai *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Spring AI",
          "vendor": "Spring",
          "versions": [
            {
              "status": "affected",
              "version": "2.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "security@vmware.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:vmware:spring_ai:*:-:*:*:*:*:*:*",
              "matchCriteriaId": "982C3A10-D1CC-47BA-89FC-E6687E8ADBE5",
              "versionEndExcluding": "2.0.1",
              "versionStartIncluding": "2.0.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The MCP Streamable HTTP server transport (WebFlux and WebMvc variants) does not place any limit on the number of sessions it retains, and by default does not require clients to be authenticated. As a result, a remote attacker can cause the server to accumulate an unbounded number of sessions over time, gradually exhausting available memory and ultimately causing a Denial of Service that affects all legitimate clients.\nAffected versions:\nSpring AI: 2.0.0"
    },
    {
      "lang": "es",
      "value": "El transporte de servidor HTTP MCP Streamable (variantes WebFlux y WebMvc) no impone ning\u00fan l\u00edmite en el n\u00famero de sesiones que retiene y, por defecto, no requiere que los clientes est\u00e9n autenticados. Como resultado, un atacante remoto puede hacer que el servidor acumule un n\u00famero ilimitado de sesiones con el tiempo, agotando gradualmente la memoria disponible y, en \u00faltima instancia, causando una denegaci\u00f3n de servicio que afecta a todos los clientes leg\u00edtimos.\nVersiones afectadas:\nSpring AI: 2.0.0"
    }
  ],
  "id": "CVE-2026-59279",
  "lastModified": "2026-10-16T15:10:00.103",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security@vmware.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-59279",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-21T14:28:32.649540Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-21T12:16:30.013",
  "references": [
    {
      "source": "security@vmware.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://spring.io/security/cve-2026-59279"
    }
  ],
  "sourceIdentifier": "security@vmware.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ],
      "source": "security@vmware.com",
      "type": "Secondary"
    }
  ]
}



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