CVE-2026-39843

{
  "id": "CVE-2026-39843",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-09T16:16:31.087",
  "lastModified": "2026-10-25T23:10:00.167",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Plane is an an open-source project management tool. From 0.28.0 to before 1.3.0, the remediation of GHSA-jcc6-f9v6-f7jw is incomplete which could lead to the same full read Server-Side Request Forgery when a normal html page contains a link tag with an href that redirects to a private IP address is supplied to Add link by an authenticated attacker with low privileges. Redirects for the main page URL are validated, but not the favicon fetch path. fetch_and_encode_favicon() still uses requests.get(favicon_url, ...) with the default redirect-following. This vulnerability is fixed in 1.3.0."
    },
    {
      "lang": "es",
      "value": "Plane es una herramienta de gestión de proyectos de código abierto. Desde la versión 0.28.0 hasta antes de la 1.3.0, la remediación de GHSA-jcc6-f9v6-f7jw es incompleta, lo que podría llevar a la misma falsificación de petición del lado del servidor de lectura completa cuando una página HTML normal contiene una etiqueta link con un href que redirige a una dirección IP privada es suministrada a Add link por un atacante autenticado con bajos privilegios. Las redirecciones para la URL de la página principal son validadas, pero no la ruta de obtención del favicon. fetch_and_encode_favicon() todavía usa requests.get(favicon_url, ...) con el seguimiento de redirección predeterminado. Esta vulnerabilidad se corrige en la versión 1.3.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "makeplane",
          "product": "plane",
          "versions": [
            {
              "version": ">= 0.28.0, < 1.3.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "baseScore": 7.7,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 4.0
      },
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "baseScore": 7.7,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 4.0
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-13T20:05:19.321734Z",
          "id": "CVE-2026-39843",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:plane:plane:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "0.28.0",
              "versionEndExcluding": "1.3.0",
              "matchCriteriaId": "3970711C-9965-41A8-97F4-A27EE7B3EF01"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/makeplane/plane/security/advisories/GHSA-9fr2-pprw-pp9j",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    }
  ]
}