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CVE-2026-23768

Estado: AnalizadaMedia (6.1)—

lucy-xss-filter before commit 7c1de6d allows an attacker to induce server-side HEAD requests to arbitrary URLs when the ObjectSecurityListener or EmbedSecurityListener option is enabled and embed or object tags are used with a src attribute missing a file extension.

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)

Naver — Lucy-xss-filter

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-23768",
  "cveTags": [
    {
      "tags": [
        "unsupported-when-assigned"
      ],
      "sourceIdentifier": "cve@navercorp.com"
    }
  ],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-23768",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-01-16T16:00:12.874657Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 6.1,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 2.7,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "cve@navercorp.com",
      "affectedData": [
        {
          "repo": "https://github.com/naver/lucy-xss-filter",
          "vendor": "NAVER",
          "product": "lucy-xss-filter",
          "versions": [
            {
              "status": "unaffected",
              "version": "7c1de6db76749ceb7b382493da29c4348853cf6b",
              "versionType": "git"
            }
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-01-16T06:15:51.333",
  "references": [
    {
      "url": "https://cve.naver.com/detail/cve-2026-23768.html",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "cve@navercorp.com"
    },
    {
      "url": "https://github.com/naver/lucy-xss-filter/pull/31",
      "tags": [
        "Exploit",
        "Patch"
      ],
      "source": "cve@navercorp.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "cve@navercorp.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "lucy-xss-filter before commit 7c1de6d allows an attacker to induce server-side HEAD requests to arbitrary URLs when the ObjectSecurityListener or EmbedSecurityListener option is enabled and embed or object tags are used with a src attribute missing a file extension."
    },
    {
      "lang": "es",
      "value": "lucy-xss-filter antes del commit 7c1de6d permite a un atacante inducir solicitudes HEAD del lado del servidor a URLs arbitrarias cuando la opción ObjectSecurityListener o EmbedSecurityListener está habilitada y se utilizan etiquetas embed u object con un atributo src al que le falta una extensión de archivo."
    }
  ],
  "lastModified": "2026-06-17T10:22:04.937",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:naver:lucy-xss-filter:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EE152946-8B7E-490F-986A-D584F6CC5D4D",
              "versionEndExcluding": "2025-06-08"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@navercorp.com"
}