« Volver al listado

CVE-2026-46431

Estado: AplazadaMedia (4.3)—

Algernon is a small self-contained pure-Go web server. Prior to 1.17.7, the SSE event server's Access-Control-Allow-Origin response header was hardcoded to the wildcard * regardless of the caller's Origin. Because EventSource does not preflight and does not send cookies, the wildcard is sufficient to let any third-party page the developer visits open a cross-origin EventSource to the SSE port and read the live filename stream from JavaScript. This vulnerability is fixed in 1.17.7.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Algernon — AlgernonAI

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-46431",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-46431",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-05-26T17:38:47.158630Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "security-advisories@github.com",
      "affectedData": [
        {
          "vendor": "xyproto",
          "product": "algernon",
          "versions": [
            {
              "status": "affected",
              "version": "< 1.17.7"
            }
          ]
        }
      ]
    }
  ],
  "published": "2026-05-26T17:16:51.100",
  "references": [
    {
      "url": "https://github.com/xyproto/algernon/security/advisories/GHSA-hw27-4v2q-5qff",
      "source": "security-advisories@github.com"
    },
    {
      "url": "https://github.com/xyproto/algernon/security/advisories/GHSA-hw27-4v2q-5qff",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security-advisories@github.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-942"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Algernon is a small self-contained pure-Go web server. Prior to 1.17.7, the SSE event server's Access-Control-Allow-Origin response header was hardcoded to the wildcard * regardless of the caller's Origin. Because EventSource does not preflight and does not send cookies, the wildcard is sufficient to let any third-party page the developer visits open a cross-origin EventSource to the SSE port and read the live filename stream from JavaScript. This vulnerability is fixed in 1.17.7."
    },
    {
      "lang": "es",
      "value": "Algernon es un pequeño servidor web autocontenido pure-Go. Antes de la 1.17.7, el encabezado de respuesta Access-Control-Allow-Origin del servidor de eventos SSE estaba codificado de forma rígida al comodín * independientemente del Origin del llamador. Debido a que EventSource no realiza una solicitud de pre-vuelo y no envía cookies, el comodín es suficiente para permitir que cualquier página de terceros que el desarrollador visite abra un EventSource de origen cruzado al puerto SSE y lea el flujo de nombres de archivo en vivo desde JavaScript. Esta vulnerabilidad está corregida en la 1.17.7."
    }
  ],
  "lastModified": "2026-07-24T11:10:00.170",
  "sourceIdentifier": "security-advisories@github.com"
}