GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

GHSA-V2WJ-Q39Q-566R

Vulnerability from github – Published: 2026-04-06 18:03 – Updated: 2026-04-07 22:16
VLAI
Summary
Vite: `server.fs.deny` bypassed with queries
Details

Summary

The contents of files that are specified by server.fs.deny can be returned to the browser.

Impact

Only apps that match the following conditions are affected:

Details

On the Vite dev server, files that should be blocked by server.fs.deny (e.g., .env, *.crt) can be retrieved with HTTP 200 responses when query parameters such as ?raw, ?import&raw, or ?import&url&inline are appended.

PoC

  1. Start the dev server: pnpm exec vite root --host 127.0.0.1 --port 5175 --strictPort
  2. Confirm that server.fs.deny is enforced (expect 403): curl -i http://127.0.0.1:5175/src/.env | head -n 20 image
  3. Confirm that the same files can be retrieved with query parameters (expect 200): image
Severity
8.2 (High)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Show details on source website
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 8.0.4"
      },
      "package": {
        "ecosystem": "npm",
        "name": "vite"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.0.0"
            },
            {
              "fixed": "8.0.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 7.3.1"
      },
      "package": {
        "ecosystem": "npm",
        "name": "vite"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.1.0"
            },
            {
              "fixed": "7.3.2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-39364"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-180",
      "CWE-284"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-06T18:03:32Z",
    "nvd_published_at": "2026-04-07T20:16:30Z",
    "severity": "HIGH"
  },
  "details": "### Summary\n\nThe contents of files that are specified by [`server.fs.deny`](https://vite.dev/config/server-options#server-fs-deny) can be returned to the browser.\n\n### Impact\n\nOnly apps that match the following conditions are affected:\n\n- explicitly exposes the Vite dev server to the network (using `--host` or [`server.host` config option](https://vitejs.dev/config/server-options.html#server-host))\n- the sensitive file exists in the allowed directories specified by [`server.fs.allow`](https://vite.dev/config/server-options#server-fs-allow)\n- the sensitive file is denied with a pattern that matches a file by [`server.fs.deny`](https://vite.dev/config/server-options#server-fs-deny)\n\n### Details\n\nOn the Vite dev server, files that should be blocked by `server.fs.deny` (e.g., `.env`, `*.crt`) can be retrieved with HTTP 200 responses when query parameters such as `?raw`, `?import\u0026raw`, or `?import\u0026url\u0026inline` are appended.\n\n### PoC\n\n1. Start the dev server: `pnpm exec vite root --host 127.0.0.1 --port 5175 --strictPort`\n2. Confirm that `server.fs.deny` is enforced (expect 403): `curl -i http://127.0.0.1:5175/src/.env | head -n 20`\n   \u003cimg width=\"3944\" height=\"1092\" alt=\"image\" src=\"https://github.com/user-attachments/assets/ecb9f2e0-e08f-4ac7-b194-e0f988c4cd4f\" /\u003e\n3. Confirm that the same files can be retrieved with query parameters (expect 200):\n   \u003cimg width=\"2014\" height=\"373\" alt=\"image\" src=\"https://github.com/user-attachments/assets/76bc2a6a-44f4-4161-ae47-eab5ae0c04a8\" /\u003e",
  "id": "GHSA-v2wj-q39q-566r",
  "modified": "2026-04-07T22:16:17Z",
  "published": "2026-04-06T18:03:32Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vitejs/vite/security/advisories/GHSA-v2wj-q39q-566r"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39364"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitejs/vite/pull/22160"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitejs/vite/commit/a9a3df299378d9cbc5f069e3536a369f8188c8ff"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/vitejs/vite"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitejs/vite/releases/tag/v7.3.2"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitejs/vite/releases/tag/v8.0.5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Vite: `server.fs.deny` bypassed with queries"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.