{"id":"CVE-2026-39363","aliases":["CLSA-2026-1784683083","CLSA-2026-1792225953","EUVD-2026-19871","GHSA-p9ff-h696-f583","RHSA-2026:24761","RHSA-2026:24762","ROOT-APP-NPM-CVE-2026-39363"],"status":"published","title":"Vite Affected by Arbitrary File Read via Vite Dev Server WebSocket","description":"Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, if it is possible to connect to the Vite dev server’s WebSocket without an Origin header, an attacker can invoke fetchModule via the custom WebSocket event vite:invoke and combine file://... with ?raw (or ?inline) to retrieve the contents of arbitrary files on the server as a JavaScript string (e.g., export default \"...\"). The access control enforced in the HTTP request path (such as server.fs.allow) is not applied to this WebSocket-based execution path. This vulnerability is fixed in 6.4.2, 7.3.2, and 8.0.5.","severity":{"version":"4.0","score":8.2,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.03396,"percentile":0.89005,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-1220","CWE-200","CWE-306"],"published":"2026-04-06T18:03:24Z","modified":"2026-11-04T10:47:22Z","exploits":[{"source":"pocgithub","id":"Firebasky/CVE-2026-39363","title":"Firebasky/CVE-2026-39363","date":"2026-04-08","url":"https://github.com/Firebasky/CVE-2026-39363"},{"source":"pocgithub","id":"f4s1on/CVE-2026-39363","title":"f4s1on/CVE-2026-39363","date":"2026-05-06","url":"https://github.com/f4s1on/CVE-2026-39363"},{"source":"pocgithub","id":"sunynov/CVE-2026-39363","title":"sunynov/CVE-2026-39363","date":"2026-08-04","url":"https://github.com/sunynov/CVE-2026-39363"},{"source":"nuclei","id":"CVE-2026-39363","title":"Vite Dev 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6996","tags":["advisory"]},{"url":"https://github.com/isaacs/minimatch/commit/2e111f3a79abc00fa73110195de2c0f2351904f5","tags":["article"]},{"url":"https://github.com/isaacs/minimatch/security/advisories/GHSA-3ppc-4f35-3m26","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-27904","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-27904","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27904","tags":["advisory"]},{"url":"https://github.com/isaacs/minimatch/security/advisories/GHSA-23c5-xmqv-rm74","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-30922","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-30922","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-30922","tags":["advisory"]},{"url":"https://github.com/pyasn1/pyasn1/commit/25ad481c19fdb006e20485ef3fc2e5b3eff30ef0","tags":["article"]},{"url":"https://github.com/pyasn1/pyasn1/security/advisories/GHSA-jr27-m4p2-rc6r","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-32280","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-32280","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32280","tags":["advisory"]},{"url":"https://go.dev/cl/758320","tags":["article"]},{"url":"https://go.dev/issue/78282","tags":["article"]},{"url":"https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU","tags":["article"]},{"url":"https://pkg.go.dev/vuln/GO-2026-4947","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-32282","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-32282","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32282","tags":["advisory"]},{"url":"https://go.dev/cl/763761","tags":["article"]},{"url":"https://go.dev/issue/78293","tags":["article"]},{"url":"https://pkg.go.dev/vuln/GO-2026-4864","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-32283","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-32283","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-32283","tags":["advisory"]},{"url":"https://go.dev/cl/763767","tags":["article"]},{"url":"https://go.dev/issue/78334","tags":["article"]},{"url":"https://pkg.go.dev/vuln/GO-2026-4870","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-33891","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-33891","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33891","tags":["advisory"]},{"url":"https://github.com/digitalbazaar/forge/commit/9bb8d67b99d17e4ebb5fd7596cd699e11f25d023","tags":["article"]},{"url":"https://github.com/digitalbazaar/forge/security/advisories/GHSA-5m6q-g25r-mvwx","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-33894","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-33894","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33894","tags":["advisory"]},{"url":"https://datatracker.ietf.org/doc/html/rfc2313#section-8","tags":["article"]},{"url":"https://github.com/digitalbazaar/forge/security/advisories/GHSA-ppp5-5v6c-4jwp","tags":["article"]},{"url":"https://mailarchive.ietf.org/arch/msg/openpgp/5rnE9ZRN1AokBVj3VqblGlP63QE","tags":["article"]},{"url":"https://www.rfc-editor.org/rfc/rfc8017.html","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-33895","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-33895","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33895","tags":["advisory"]},{"url":"https://datatracker.ietf.org/doc/html/rfc8032#section-8.4","tags":["article"]},{"url":"https://github.com/digitalbazaar/forge/commit/bdecf11571c9f1a487cc0fe72fe78ff6dfa96b85","tags":["article"]},{"url":"https://github.com/digitalbazaar/forge/security/advisories/GHSA-q67f-28xg-22rw","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-33896","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-33896","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33896","tags":["advisory"]},{"url":"https://github.com/digitalbazaar/forge/commit/2e492832fb25227e6b647cbe1ac981c123171e90","tags":["article"]},{"url":"https://github.com/digitalbazaar/forge/security/advisories/GHSA-2328-f5f3-gj25","tags":["article"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-39363","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-39892","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-39892","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-39892","tags":["advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2026/04/08/12","tags":["article"]},{"url":"https://github.com/pyca/cryptography/commit/622d672e429a7cff836a23c5903683dbec1901f5","tags":["article"]},{"url":"https://github.com/pyca/cr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Affected by Arbitrary File Read via Vite Dev Server WebSocket","description":"Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, if it is possible to connect to the Vite dev server’s WebSocket without an Origin header, an attacker can invoke fetchModule via the custom WebSocket event vite:invoke and combine file://... with ?raw (or ?inline) to retrieve the contents of arbitrary files on the server as a JavaScript string (e.g., export default \"...\"). The access control enforced in the HTTP request path (such as server.fs.allow) is not applied to this WebSocket-based execution path. This vulnerability is fixed in 6.4.2, 7.3.2, and 8.0.5.","status":"published","published":"2026-04-07T19:10:44.916Z","modified":"2026-08-25T12:05:41.283Z","cvss":[{"version":"4.0","score":8.2,"vector":"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","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"adp"}],"cwes":["CWE-200","CWE-306","CWE-1220"],"updated_at":"2026-11-02T14:20:02.290587Z"}],"euvd":[{"id":"EUVD-2026-19871","description":"Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, if it is possible to connect to the Vite dev server’s WebSocket without an Origin header, an attacker can invoke fetchModule via the custom WebSocket event vite:invoke and combine file://... with ?raw (or ?inline) to retrieve the contents of arbitrary files on the server as a JavaScript string (e.g., export default \"...\"). The access control enforced in the HTTP request path (such as server.fs.allow) is not applied to this WebSocket-based execution path. This vulnerability is fixed in 6.4.2, 7.3.2, and 8.0.5.","status":"published","published":"2026-04-07T19:10:44Z","modified":"2026-08-25T12:05:41Z","cvss":[{"version":"4.0","score":8.2,"vector":"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","level":"high"}],"updated_at":"2026-11-02T18:01:33.385611Z"}],"ghsa":[{"id":"GHSA-p9ff-h696-f583","title":"Vite Vulnerable to Arbitrary File Read via Vite Dev Server WebSocket","description":"### Summary\n\n[`server.fs`](https://vite.dev/config/server-options#server-fs-strict) check was not enforced to the `fetchModule` method that is exposed in Vite dev server's WebSocket. \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- WebSocket is not disabled by `server.ws: false`\n\nArbitrary files on the server (development machine, CI environment, container, etc.) can be exposed.\n\n### Details\n\nIf it is possible to connect to the Vite dev server’s WebSocket **without an `Origin` header**, an attacker can invoke `fetchModule` via the custom WebSocket event `vite:invoke` and combine `file://...` with `?raw` (or `?inline`) to retrieve the contents of arbitrary files on the server as a JavaScript string (e.g., `export default \"...\"`).\n\nThe access control enforced in the HTTP request path (such as `server.fs.allow`) is not applied to this WebSocket-based execution path.\n\n### PoC\n\n1. Start the dev server on the target \n   Example (used during validation with this repository):\n   ```bash\n   pnpm -C playground/alias exec vite --host 0.0.0.0 --port 5173\n   ```\n\n2. Confirm that access is blocked via the HTTP path (example: arbitrary file)\n   ```bash\n   curl -i 'http://localhost:5173/@fs/etc/passwd?raw'\n   ```\n   Result: `403 Restricted` (outside the allow list)\n   \u003cimg width=\"3898\" height=\"1014\" alt=\"image\" src=\"https://github.com/user-attachments/assets/f6593377-549c-45d7-b562-5c19833438af\" /\u003e\n\n3. Confirm that the same file can be retrieved via the WebSocket path\n   By connecting to the HMR WebSocket without an `Origin` header and sending a `vite:invoke` request that calls `fetchModule` with a `file://...` URL and `?raw`, the file contents are returned as a JavaScript module.\n  \u003cimg width=\"1049\" height=\"296\" alt=\"image\" src=\"https://github.com/user-attachments/assets/af969f7b-d34e-4af4-8adb-5e2b83b31972\" /\u003e\n  \u003cimg width=\"1382\" height=\"955\" alt=\"image\" src=\"https://github.com/user-attachments/assets/6a230d2e-197a-4c9c-b373-d0129756d5d7\" /\u003e","status":"published","published":"2026-04-06T18:03:24Z","modified":"2026-04-07T22:16:11Z","cvss":[{"version":"4.0","score":8.2,"vector":"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","level":"high"}],"cwes":["CWE-200","CWE-306"],"updated_at":"2026-11-02T14:39:51.193071Z"}],"nvd":[{"id":"CVE-2026-39363","description":"Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, if it is possible to connect to the Vite dev server’s WebSocket without an Origin header, an attacker can invoke fetchModule via the custom WebSocket event vite:invoke and combine file://... with ?raw (or ?inline) to retrieve the contents of arbitrary files on the server as a JavaScript string (e.g., export default \"...\"). The access control enforced in the HTTP request path (such as server.fs.allow) is not applied to this WebSocket-based execution path. This vulnerability is fixed in 6.4.2, 7.3.2, and 8.0.5.","status":"published","published":"2026-04-07T20:16:30Z","modified":"2026-08-25T13:18:45.007Z","cvss":[{"version":"4.0","score":8.2,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-200","CWE-306","CWE-1220"],"updated_at":"2026-11-02T14:12:13.535987Z"}],"osv":[{"id":"CVE-2026-39363","title":"Vite Affected by Arbitrary File Read via Vite Dev Server WebSocket","description":"Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, if it is possible to connect to the Vite dev server’s WebSocket without an Origin header, an attacker can invoke fetchModule via the custom WebSocket event vite:invoke and combine file://... with ?raw (or ?inline) to retrieve the contents of arbitrary files on the server as a JavaScript string (e.g., export default \"...\"). The access control enforced in the HTTP request path (such as server.fs.allow) is not applied to this WebSocket-based execution path. This vulnerability is fixed in 6.4.2, 7.3.2, and 8.0.5.","status":"published","published":"2026-04-07T19:10:44.916Z","modified":"2026-11-04T10:47:22.731739165Z","cvss":[{"version":"4.0","score":8.2,"vector":"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","level":"high"}],"cwes":["CWE-200","CWE-306"],"updated_at":"2026-11-04T11:07:06.271559Z"},{"id":"GHSA-p9ff-h696-f583","title":"Vite Vulnerable to Arbitrary File Read via Vite Dev Server WebSocket","description":"### Summary\n\n[`server.fs`](https://vite.dev/config/server-options#server-fs-strict) check was not enforced to the `fetchModule` method that is exposed in Vite dev server's WebSocket. \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- WebSocket is not disabled by `server.ws: false`\n\nArbitrary files on the server (development machine, CI environment, container, etc.) can be exposed.\n\n### Details\n\nIf it is possible to connect to the Vite dev server’s WebSocket **without an `Origin` header**, an attacker can invoke `fetchModule` via the custom WebSocket event `vite:invoke` and combine `file://...` with `?raw` (or `?inline`) to retrieve the contents of arbitrary files on the server as a JavaScript string (e.g., `export default \"...\"`).\n\nThe access control enforced in the HTTP request path (such as `server.fs.allow`) is not applied to this WebSocket-based execution path.\n\n### PoC\n\n1. Start the dev server on the target \n   Example (used during validation with this repository):\n   ```bash\n   pnpm -C playground/alias exec vite --host 0.0.0.0 --port 5173\n   ```\n\n2. Confirm that access is blocked via the HTTP path (example: arbitrary file)\n   ```bash\n   curl -i 'http://localhost:5173/@fs/etc/passwd?raw'\n   ```\n   Result: `403 Restricted` (outside the allow list)\n   \u003cimg width=\"3898\" height=\"1014\" alt=\"image\" src=\"https://github.com/user-attachments/assets/f6593377-549c-45d7-b562-5c19833438af\" /\u003e\n\n3. Confirm that the same file can be retrieved via the WebSocket path\n   By connecting to the HMR WebSocket without an `Origin` header and sending a `vite:invoke` request that calls `fetchModule` with a `file://...` URL and `?raw`, the file contents are returned as a JavaScript module.\n  \u003cimg width=\"1049\" height=\"296\" alt=\"image\" src=\"https://github.com/user-attachments/assets/af969f7b-d34e-4af4-8adb-5e2b83b31972\" /\u003e\n  \u003cimg width=\"1382\" height=\"955\" alt=\"image\" src=\"https://github.com/user-attachments/assets/6a230d2e-197a-4c9c-b373-d0129756d5d7\" /\u003e","status":"published","published":"2026-04-06T18:03:24Z","modified":"2026-09-10T03:51:02.521776335Z","cvss":[{"version":"4.0","score":8.2,"vector":"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","level":"high"}],"cwes":["CWE-200","CWE-306"],"updated_at":"2026-11-02T15:46:52.891208Z"},{"id":"RHSA-2026:24761","title":"Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.5 Product Security and Bug Fix Update","status":"published","published":"2026-06-10T10:07:59Z","modified":"2026-10-20T10:06:29Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:19.449341Z"},{"id":"RHSA-2026:24762","title":"Red Hat Security Advisory: Red Hat Ansible Automation Platform 2.6 Product Security and Bug Fix Update","status":"published","published":"2026-06-10T10:08:00Z","modified":"2026-10-20T10:06:29Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:19.449341Z"},{"id":"ROOT-APP-NPM-CVE-2026-39363","title":"CVE-2026-39363 in vite - Patched by Root","description":"Root has patched CVE-2026-39363 in the vite package for Root:npm. Multiple fixed versions available.","status":"published","published":"2026-10-26T09:20:10Z","modified":"2026-10-26T10:15:03.038191073Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:53:27.649662Z"},{"id":"CLSA-2026-1784683083","title":"TuxCare security update for vite (6 CVEs)","description":"TuxCare rebuilt vite to address 6 CVEs. Fixed in 2.9.18-tuxcare.2.","status":"published","published":"2026-08-04T14:52:47Z","modified":"2026-10-30T19:46:01.439880797Z","updated_at":"2026-11-02T15:43:46.482572Z"},{"id":"CLSA-2026-1792225953","title":"TuxCare security update for @vitejs/plugin-react (7 CVEs)","description":"TuxCare rebuilt @vitejs/plugin-react to address 7 CVEs. Fixed in 2.9.18-tuxcare.2.","status":"published","published":"2026-10-17T08:32:31Z","modified":"2026-10-17T13:09:24.727766679Z","updated_at":"2026-11-02T15:43:52.011757Z"}]}}