CVE-2026-48824

{
  "id": "CVE-2026-48824",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-20T16:17:03.080",
  "lastModified": "2026-10-24T20:10:00.137",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Mailpit is an email testing tool and API for developers. Prior to version 1.30.1, the fix for GHSA-fpxj-m5q8-fphw (CVE-2026-45710, \"Mailpit: Set a default 50MB p/m limit to prevent DoS via unlimited SMTP DATA and /api/v1/send body sizes\") wrapped only `POST /api/v1/send` with `http.MaxBytesReader`. The four other Mailpit JSON-body API endpoints  `PUT /api/v1/messages` (SetReadStatus), `DELETE /api/v1/messages` (DeleteMessages), `PUT /api/v1/tags` (SetMessageTags), and `POST /api/v1/message/{id}/release` (ReleaseMessage)  still call `json.NewDecoder(r.Body)` directly with no body-size cap and remain reachable unauthenticated in the default `docker run axllent/mailpit:latest` deploy. An unauthenticated remote attacker can post a multi-million-element `IDs` slice and drive RSS from ~25 MiB baseline to ~450 MiB per 16 MB request body. Repeating across multiple connections accumulates the same per-request amplification per process. Version 1.30.1 contains a patch."
    },
    {
      "lang": "es",
      "value": "Mailpit es una herramienta de prueba de correo electrónico y una API para desarrolladores. Antes de la versión 1.30.1, la corrección para GHSA-fpxj-m5q8-fphw (CVE-2026-45710, ’Mailpit: Establecer un límite predeterminado de 50 MB p/m para prevenir DoS a través de tamaños de cuerpo ilimitados de SMTP DATA y /api/v1/send’) envolvió solo “POST /api/v1/send” con “http.MaxBytesReader”. Los otros cuatro endpoints de la API de Mailpit con cuerpo JSON “PUT /api/v1/messages” (SetReadStatus), “DELETE /api/v1/messages” (DeleteMessages), “PUT /api/v1/tags” (SetMessageTags) y “POST /api/v1/message/{id}/release” (ReleaseMessage) todavía llaman a “json.NewDecoder(r.Body)” directamente sin límite de tamaño de cuerpo y permanecen accesibles sin autenticación en el despliegue predeterminado de “docker run axllent/mailpit:latest”. Un atacante remoto no autenticado puede publicar un slice “IDs” de varios millones de elementos y llevar el RSS de una línea base de ~25 MiB a ~450 MiB por cuerpo de solicitud de 16 MB. La repetición a través de múltiples conexiones acumula la misma amplificación por solicitud por proceso. La versión 1.30.1 contiene un parche."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "axllent",
          "product": "mailpit",
          "versions": [
            {
              "version": "< 1.30.1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-20T19:01:37.901255Z",
          "id": "CVE-2026-48824",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:axllent:mailpit:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "1.30.1",
              "matchCriteriaId": "EED16083-B2DE-4607-BB41-B3239D592BCF"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/axllent/mailpit/releases/tag/v1.30.1",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/axllent/mailpit/security/advisories/GHSA-28pq-6qxg-wg5r",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    }
  ]
}