CVE-2026-13323

{
  "id": "CVE-2026-13323",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-01T12:16:38.117",
  "lastModified": "2026-10-25T17:10:00.197",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In Open VSX Registry before 1.0.2, the /vscode/unpkg/ endpoint serves user-supplied HTML files with Content-Type: text/html and without a Content-Security-Policy or Content-Disposition: attachment response header. An unauthenticated attacker can register a publisher account, upload a VSIX containing a crafted HTML payload, and induce an authenticated user to visit the resulting URL. The browser renders the file inline in the open-vsx.org origin context, enabling session token exfiltration, persistent Personal Access Token (PAT) generation, and unauthorized publication of malicious extension versions. Because Open VSX extensions are distributed to VS Code, VSCodium, Cursor, Windsurf, and compatible editors, a compromised extension update constitutes a supply chain attack against all downstream users."
    },
    {
      "lang": "es",
      "value": "En Open VSX Registry antes de 1.0.2, el endpoint /vscode/unpkg/ sirve archivos HTML proporcionados por el usuario con Content-Type: text/html y sin una cabecera de respuesta Content-Security-Policy o Content-Disposition: attachment. Un atacante no autenticado puede registrar una cuenta de editor, cargar un VSIX que contenga una carga útil HTML manipulada e inducir a un usuario autenticado a visitar la URL resultante. El navegador renderiza el archivo en línea en el contexto de origen open-vsx.org, lo que permite la exfiltración de tokens de sesión, la generación persistente de tokens de acceso personal (PAT) y la publicación no autorizada de versiones de extensiones maliciosas. Debido a que las extensiones de Open VSX se distribuyen a VS Code, VSCodium, Cursor, Windsurf y editores compatibles, una actualización de extensión comprometida constituye un ataque a la cadena de suministro contra todos los usuarios finales."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Eclipse Foundation",
          "product": "Eclipse Open VSX",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0.1.0",
              "lessThan": "1.0.2",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N",
          "baseScore": 4.1,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "LOW",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 1.4
      },
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N",
          "baseScore": 8.7,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 2.3,
        "impactScore": 5.8
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-01T12:13:20.675139Z",
          "id": "CVE-2026-13323",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:eclipse:open_vsx:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "1.0.2",
              "matchCriteriaId": "B5F7F9F8-48A6-4604-8CA4-65FCF39BA2FD"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/eclipse-openvsx/openvsx/pull/1922",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/485",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/485",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Vendor Advisory"
      ]
    }
  ]
}