CVE-2026-28684

{
  "id": "CVE-2026-28684",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-20T17:16:33.087",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "python-dotenv reads key-value pairs from a .env file and can set them as environment variables. Prior to version 1.2.2, `set_key()` and `unset_key()` in python-dotenv follow symbolic links when rewriting `.env` files, allowing a local attacker to overwrite arbitrary files via a crafted symlink when a cross-device rename fallback is triggered. Users should upgrade to v.1.2.2 or, as a workaround, apply the patch manually."
    },
    {
      "lang": "es",
      "value": "python-dotenv lee pares clave-valor de un archivo .env y puede establecerlos como variables de entorno. Antes de la versión 1.2.2, “set_key()” y “unset_key()” en python-dotenv siguen enlaces simbólicos al reescribir archivos “.env”, permitiendo a un atacante local sobrescribir archivos arbitrarios a través de un symlink manipulado cuando se activa una alternativa de renombrado entre dispositivos. Los usuarios deberían actualizar a la v.1.2.2 o, como solución alternativa, aplicar el parche manualmente."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "theskumar",
          "product": "python-dotenv",
          "versions": [
            {
              "version": "< 1.2.2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H",
          "baseScore": 6.6,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.3,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-20T17:43:03.518532Z",
          "id": "CVE-2026-28684",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-59"
        },
        {
          "lang": "en",
          "value": "CWE-61"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:saurabh-kumar:python-dotenv:*:*:*:*:*:python:*:*",
              "versionEndExcluding": "1.2.2",
              "matchCriteriaId": "073ED303-9AEE-4532-B10A-8C16C2FDC5A3"
            }
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  ],
  "references": [
    {
      "url": "https://github.com/theskumar/python-dotenv/commit/790c5c02991100aa1bf41ee5330aca75edc51311",
      "source": "[email protected]",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/theskumar/python-dotenv/releases/tag/v1.2.2",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/theskumar/python-dotenv/security/advisories/GHSA-mf9w-mj56-hr94",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/theskumar/python-dotenv/security/advisories/GHSA-mf9w-mj56-hr94",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Patch",
        "Vendor Advisory"
      ]
    }
  ]
}