Vulnerability-Lookup

CVE-2026-73653 (GCVE-0-2026-73653)

Vulnerability from cvelistv5 – Published: 2026-08-13 18:19 – Updated: 2026-08-13 18:42

Title

Vitest: Browser Mode provider commands bypass the file-access permission gate

Summary

Vitest is a testing framework powered by Vite. Prior to versions 3.2.7, 4.1.10, and 5.0.0-beta.6, Browser Mode provider commands including upload, takeScreenshot, screenshotMatcher, stopChunkTrace, deleteTracing, and annotateTraces accept browser-supplied file paths without enforcing the allowWrite permission gate or confining paths to the project root. A client that can reach the Browser Mode API can read arbitrary local files, create or overwrite image and trace files, or delete files accessible to the Vitest process even when allowWrite is false. This issue is fixed in versions 3.2.7, 4.1.10, and 5.0.0-beta.6.

Severity

9.4 (Critical)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-13 18:42 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-552 - Files or Directories Accessible to External Parties
CWE-862 - Missing Authorization

Assigner

GitHub_M

References

10 references

URL	Tags
https://github.com/vitest-dev/vitest/security/adv…	x_refsource_CONFIRM
https://github.com/vitest-dev/vitest/pull/10674	x_refsource_MISC
https://github.com/vitest-dev/vitest/pull/10679	x_refsource_MISC
https://github.com/vitest-dev/vitest/pull/10680	x_refsource_MISC
https://github.com/vitest-dev/vitest/commit/33f96…	x_refsource_MISC
https://github.com/vitest-dev/vitest/commit/5c18d…	x_refsource_MISC
https://github.com/vitest-dev/vitest/commit/b795e…	x_refsource_MISC
https://github.com/vitest-dev/vitest/releases/tag…	x_refsource_MISC
https://github.com/vitest-dev/vitest/releases/tag…	x_refsource_MISC
https://github.com/vitest-dev/vitest/releases/tag…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
vitest-dev	vitest	Affected: < 3.2.7 Affected: >= 4.0.0, < 4.1.10 Affected: >= 5.0.0-beta.1, < 5.0.0-beta.6

Show details on NVD website

JSON

To clipboard

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GHSA-P63J-VCC4-9VMV

Vulnerability from github – Published: 2026-07-21 19:36 – Updated: 2026-08-13 18:19

Summary

@vitest/browser: Browser Mode provider commands bypass the file-access permission gate

Details

Summary

Browser Mode exposes a set of built-in "commands" that run on the Node.js side of the test runner and can touch the local filesystem (taking screenshots, managing Playwright traces, uploading files for <input type="file">, comparing screenshots).

Several of these commands accept a file path from the browser and act on it without checking the allowWrite permission gate and without confining the path to the project directory. A client that can reach the Browser Mode API can therefore read, create, overwrite, or delete files anywhere the Vitest process can access, even when allowWrite is false.

This matters most when the Browser Mode API is exposed to the network (for example test.api.host is set, or the dev server is reachable from another machine or origin). In that configuration allowWrite defaults to false precisely to block file access, and these commands bypass that protection. On a default localhost-only setup with trusted test code, there is no untrusted party in a position to exploit it. The gap still matters wherever you rely on allowWrite: false to contain untrusted test code, because these commands ignore that flag.

Affected commands and impact

Command	Operation	Impact
`upload` (Playwright + WebdriverIO)	Read	Arbitrary local file read; contents are loaded into the page and readable by test code. Highest-impact case.
`takeScreenshot` (Playwright + WebdriverIO)	Write	Writes a PNG to an arbitrary path (absolute path used verbatim), creating parent directories.
`screenshotMatcher`	Write	Writes reference/diff PNGs; directory derived from client path allows partial traversal.
`stopChunkTrace`	Write	Writes a Playwright trace `.zip` to a path escapable via `../` in the trace name.
`deleteTracing`	Delete	Deletes arbitrary files by path.
`annotateTraces`	Read (disclosure)	Records a client-controlled attachment path that the reporter copies into the attachments directory, disclosing file contents.

The writes do not let an attacker choose the file contents (they produce PNG images or trace archives), so the integrity impact is creating, overwriting, or deleting a file at an arbitrary path rather than writing a chosen payload. The reads (upload, annotateTraces) are more serious because they expose the full contents of an arbitrary file.

The fix adds, to every file-touching provider command, an allowWrite check for write/delete operations and path confinement to the project root (matching the existing fs command pattern), so client-supplied absolute paths and ../ traversal are rejected.

Severity

9.4 (Critical)


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

Show details on source website

JSON

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        "name": "@vitest/browser"
      },
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    "severity": "CRITICAL"
  },
  "details": "## Summary\n\nBrowser Mode exposes a set of built-in \"commands\" that run on the Node.js side of the test runner and can touch the local filesystem (taking screenshots, managing Playwright traces, uploading files for `\u003cinput type=\"file\"\u003e`, comparing screenshots).\n\nSeveral of these commands accept a file path from the browser and act on it without checking the `allowWrite` permission gate and without confining the path to the project directory. A client that can reach the Browser Mode API can therefore read, create, overwrite, or delete files anywhere the Vitest process can access, even when `allowWrite` is `false`.\n\nThis matters most when the Browser Mode API is exposed to the network (for example `test.api.host` is set, or the dev server is reachable from another machine or origin). In that configuration `allowWrite` defaults to `false` precisely to block file access, and these commands bypass that protection. On a default localhost-only setup with trusted test code, there is no untrusted party in a position to exploit it. The gap still matters wherever you rely on `allowWrite: false` to contain untrusted test code, because these commands ignore that flag.\n\n## Affected commands and impact\n\n| Command | Operation | Impact |\n|---|---|---|\n| `upload` (Playwright + WebdriverIO) | Read | Arbitrary local file read; contents are loaded into the page and readable by test code. Highest-impact case. |\n| `takeScreenshot` (Playwright + WebdriverIO) | Write | Writes a PNG to an arbitrary path (absolute path used verbatim), creating parent directories. |\n| `screenshotMatcher` | Write | Writes reference/diff PNGs; directory derived from client path allows partial traversal. |\n| `stopChunkTrace` | Write | Writes a Playwright trace `.zip` to a path escapable via `../` in the trace name. |\n| `deleteTracing` | Delete | Deletes arbitrary files by path. |\n| `annotateTraces` | Read (disclosure) | Records a client-controlled attachment path that the reporter copies into the attachments directory, disclosing file contents. |\n\nThe writes do not let an attacker choose the file contents (they produce PNG images or trace archives), so the integrity impact is creating, overwriting, or deleting a file at an arbitrary path rather than writing a chosen payload. The reads (`upload`, `annotateTraces`) are more serious because they expose the full contents of an arbitrary file.\n\nThe fix adds, to every file-touching provider command, an `allowWrite` check for write/delete operations and path confinement to the project root (matching the existing `fs` command pattern), so client-supplied absolute paths and `../` traversal are rejected.",
  "id": "GHSA-p63j-vcc4-9vmv",
  "modified": "2026-08-13T18:19:12Z",
  "published": "2026-07-21T19:36:12Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/vitest-dev/vitest/security/advisories/GHSA-p63j-vcc4-9vmv"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitest-dev/vitest/pull/10674"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitest-dev/vitest/pull/10679"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitest-dev/vitest/pull/10680"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitest-dev/vitest/commit/33f96a145ef09ca6a43b4e555eb273e64a87be23"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitest-dev/vitest/commit/5c18dd267ff7f47f24cab2f615a16b37d90feb7f"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitest-dev/vitest/commit/b795e36b34969bec50b47a9f29d26f799a6a04fb"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/vitest-dev/vitest"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitest-dev/vitest/releases/tag/v3.2.7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitest-dev/vitest/releases/tag/v4.1.10"
    },
    {
      "type": "WEB",
      "url": "https://github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.6"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "@vitest/browser: Browser Mode provider commands bypass the file-access permission gate"
}

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-73653 (GCVE-0-2026-73653)

GHSA-P63J-VCC4-9VMV

Summary

Affected commands and impact

Tags

Sightings

Nomenclature