FKIE_CVE-2026-22689

Vulnerability from fkie_nvd - Published: 2026-01-10 06:15 - Updated: 2026-02-18 17:45
Severity ?
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Summary
Mailpit is an email testing tool and API for developers. Prior to version 1.28.2, the Mailpit WebSocket server is configured to accept connections from any origin. This lack of Origin header validation introduces a Cross-Site WebSocket Hijacking (CSWSH) vulnerability. An attacker can host a malicious website that, when visited by a developer running Mailpit locally, establishes a WebSocket connection to the victim's Mailpit instance (default ws://localhost:8025). This allows the attacker to intercept sensitive data such as email contents, headers, and server statistics in real-time. This issue has been patched in version 1.28.2.
References
security-advisories@github.comhttps://github.com/axllent/mailpit/commit/6f1f4f34c98989fd873261018fb73830b30aec3fPatch
security-advisories@github.comhttps://github.com/axllent/mailpit/security/advisories/GHSA-524m-q5m7-79mmExploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
axllent mailpit *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:axllent:mailpit:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "D35BCA11-BA2A-4A42-9488-7A39F44D3AF2",
              "versionEndExcluding": "1.28.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Mailpit is an email testing tool and API for developers. Prior to version 1.28.2, the Mailpit WebSocket server is configured to accept connections from any origin. This lack of Origin header validation introduces a Cross-Site WebSocket Hijacking (CSWSH) vulnerability. An attacker can host a malicious website that, when visited by a developer running Mailpit locally, establishes a WebSocket connection to the victim\u0027s Mailpit instance (default ws://localhost:8025). This allows the attacker to intercept sensitive data such as email contents, headers, and server statistics in real-time. This issue has been patched in version 1.28.2."
    },
    {
      "lang": "es",
      "value": "Mailpit es una herramienta de prueba de correo electr\u00f3nico y API para desarrolladores. Antes de la versi\u00f3n 1.28.2, el servidor WebSocket de Mailpit est\u00e1 configurado para aceptar conexiones desde cualquier origen. Esta falta de validaci\u00f3n del encabezado Origin introduce una vulnerabilidad de Cross-Site WebSocket Hijacking (CSWSH). Un atacante puede alojar un sitio web malicioso que, cuando es visitado por un desarrollador que ejecuta Mailpit localmente, establece una conexi\u00f3n WebSocket con la instancia de Mailpit de la v\u00edctima (por defecto ws://localhost:8025). Esto permite al atacante interceptar datos sensibles como el contenido de los correos electr\u00f3nicos, los encabezados y las estad\u00edsticas del servidor en tiempo real. Este problema ha sido parcheado en la versi\u00f3n 1.28.2."
    }
  ],
  "id": "CVE-2026-22689",
  "lastModified": "2026-02-18T17:45:58.373",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-01-10T06:15:51.900",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/axllent/mailpit/commit/6f1f4f34c98989fd873261018fb73830b30aec3f"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Mitigation",
        "Vendor Advisory"
      ],
      "url": "https://github.com/axllent/mailpit/security/advisories/GHSA-524m-q5m7-79mm"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1385"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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