Vulnerability-Lookup

CVE-2026-71319 (GCVE-0-2026-71319)

Vulnerability from cvelistv5 – Published: 2026-08-05 21:26 – Updated: 2026-08-06 14:38

Title

Nuxt.js Unauthenticated WebSocket RPC Call Leading to Remote Code Execution

Summary

Nuxt is an open-source web development framework for Vue.js. Prior to 3.3.1, Nuxt DevTools (development mode only) exposes a bidirectional RPC channel over the Vite HMR WebSocket via the nuxt:devtools:rpc plugin. On affected versions the channel has no authentication: any client that can reach the Vite HMR endpoint (ws://<host>:<port>/, subprotocol vite-hmr) can call RPC methods, with no token, handshake, or origin check before the channel is established. The updateOptions(), clearOptions(), and openInEditor() methods do not enforce the ensureDevAuthToken check that the other mutating methods use. openInEditor() reads the persisted behavior.openInEditor value and passes it to the launch-editor package, which spawns it as a child process. That value is settable through the equally unauthenticated updateOptions(). An attacker who can reach the HMR port can therefore chain updateOptions('behavior', { openInEditor: '<command>' }) then openInEditor('<any-existing-file>') to execute an arbitrary program on the developer's machine. This issue is fixed in 3.3.1.

Severity

9.6 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')
CWE-306 - Missing Authentication for Critical Function

Assigner

GitHub_M

References

3 references

URL	Tags
https://github.com/nuxt/nuxt/security/advisories/…	x_refsource_CONFIRM
https://github.com/nuxt/devtools/commit/a7b2718b9…	x_refsource_MISC
https://github.com/nuxt/devtools/releases/tag/v3.3.1	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
nuxt	devtools	Affected: < 3.3.1

Show details on NVD website

JSON

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                "id": "CVE-2026-71319",
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                "timestamp": "2026-08-06T14:38:40.363333Z",
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GHSA-279X-MWFV-VCQV

Vulnerability from github – Published: 2026-08-05 21:27 – Updated: 2026-08-05 21:27

Summary

Unauthenticated Nuxt DevTools RPC allows arbitrary command execution on the developer's host

Details

Impact

Nuxt DevTools (development mode only) exposes a bidirectional RPC channel over the Vite HMR WebSocket via the nuxt:devtools:rpc plugin. On affected versions the channel has no authentication: any client that can reach the Vite HMR endpoint (ws://<host>:<port>/, subprotocol vite-hmr) can call RPC methods, with no token, handshake, or origin check before the channel is established. The updateOptions(), clearOptions(), and openInEditor() methods do not enforce the ensureDevAuthToken check that the other mutating methods use.

openInEditor() reads the persisted behavior.openInEditor value and passes it to the launch-editor package, which spawns it as a child process. That value is settable through the equally unauthenticated updateOptions(). An attacker who can reach the HMR port can therefore chain updateOptions('behavior', { openInEditor: '<command>' }) then openInEditor('<any-existing-file>') to execute an arbitrary program on the developer's machine.

The HMR port is reachable by a process on the same host, by any peer on the LAN when the dev server is bound with nuxi dev --host, or by a malicious website the developer visits while the dev server is running (a browser can open the HMR WebSocket cross-origin). Impact is limited to development environments; production builds do not run DevTools.

Patches

Fixed in @nuxt/devtools@3.3.1. Because nuxt depends on @nuxt/devtools through a ^3.x range, updating is a lockfile refresh / reinstall; no nuxt release is required.

Workarounds

Update @nuxt/devtools to a patched version.
Do not run the dev server bound to a non-loopback interface (nuxi dev --host) on an untrusted network.
Disable DevTools entirely with devtools: { enabled: false } in nuxt.config.

References

GHSA-279x-mwfv-vcqv
launch-editor: https://www.npmjs.com/package/launch-editor

Severity

9.6 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@nuxt/devtools"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "3.3.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-71319"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94",
      "CWE-306"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-05T21:27:39Z",
    "nvd_published_at": null,
    "severity": "CRITICAL"
  },
  "details": "### Impact\n\nNuxt DevTools (development mode only) exposes a bidirectional RPC channel over the Vite HMR WebSocket via the `nuxt:devtools:rpc` plugin. On affected versions the channel has no authentication: any client that can reach the Vite HMR endpoint (`ws://\u003chost\u003e:\u003cport\u003e/`, subprotocol `vite-hmr`) can call RPC methods, with no token, handshake, or origin check before the channel is established. The `updateOptions()`, `clearOptions()`, and `openInEditor()` methods do not enforce the `ensureDevAuthToken` check that the other mutating methods use.\n\n`openInEditor()` reads the persisted `behavior.openInEditor` value and passes it to the `launch-editor` package, which spawns it as a child process. That value is settable through the equally unauthenticated `updateOptions()`. An attacker who can reach the HMR port can therefore chain `updateOptions(\u0027behavior\u0027, { openInEditor: \u0027\u003ccommand\u003e\u0027 })` then `openInEditor(\u0027\u003cany-existing-file\u003e\u0027)` to execute an arbitrary program on the developer\u0027s machine.\n\nThe HMR port is reachable by a process on the same host, by any peer on the LAN when the dev server is bound with `nuxi dev --host`, or by a malicious website the developer visits while the dev server is running (a browser can open the HMR WebSocket cross-origin). Impact is limited to development environments; production builds do not run DevTools.\n\n### Patches\n\nFixed in `@nuxt/devtools@3.3.1`. Because `nuxt` depends on `@nuxt/devtools` through a `^3.x` range, updating is a lockfile refresh / reinstall; no `nuxt` release is required.\n\n### Workarounds\n\n- Update `@nuxt/devtools` to a patched version.\n- Do not run the dev server bound to a non-loopback interface (`nuxi dev --host`) on an untrusted network.\n- Disable DevTools entirely with `devtools: { enabled: false }` in `nuxt.config`.\n\n### References\n\n- GHSA-279x-mwfv-vcqv\n- `launch-editor`: https://www.npmjs.com/package/launch-editor",
  "id": "GHSA-279x-mwfv-vcqv",
  "modified": "2026-08-05T21:27:39Z",
  "published": "2026-08-05T21:27:39Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/nuxt/nuxt/security/advisories/GHSA-279x-mwfv-vcqv"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/nuxt/nuxt"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Unauthenticated Nuxt DevTools RPC allows arbitrary command execution on the developer\u0027s host"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-71319 (GCVE-0-2026-71319)

GHSA-279X-MWFV-VCQV

Impact

Patches

Workarounds

References

Tags

Sightings

Nomenclature