CVE-2026-28414: Gradio Path Traversal Vulnerability

HIGH
Advisory Identifier: GHSA-39mp-8hj3-5c49
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CVSS 7.5
CWE-36 CWE-22
Published
Advisory Summary

CVE-2026-28414 is a HIGH (CVSS 7.5) path traversal vulnerability (CWE-36: Absolute Path Traversal) affecting Gradio libraries in the PyPI ecosystem. The issue involves gradio is vulnerable to absolute path traversal on windows with python 3.13+. Remediation is available by upgrading affected packages to version 6.7.0.

CVE-2026-28414 at a Glance

CVE Identifier CVE-2026-28414
GHSA Identifier GHSA-39mp-8hj3-5c49
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-36: Absolute Path Traversal
Affected Product Gradio
Package Ecosystem PyPI
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-28414

To remediate this vulnerability, upgrade all affected Gradio dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

gradio fixed: 6.7.0 
pip install gradio>=6.7.0
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

pip show gradio

How to Check if You Are Affected

To determine whether your Python environment is affected by CVE-2026-28414, inspect your installed packages using pip:

pip show gradio

Analyze the terminal output to locate any version of Gradio in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.7.0), your application is affected.

Note: The pip show gradio command checks currently installed packages in your active Python environment.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-36: Absolute Path Traversal, where the product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize absolute path sequences such as "/abs/path" that can resolve to a location that is outside of that directory. In Gradio, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Summary Gradio apps running on Window with Python 3.13+ are vulnerable to an absolute path traversal issue that enables unauthenticated attackers to read arbitrary files from the file system. ### Details Python 3.13+ changed the definition of `os.path.isabs` so that root-relative paths like `/windows/win.ini` on Windows are no longer considered absolute paths, resulting in a vulnerability in Gradio's logic for joining paths safely. This can be exploited by unauthenticated attackers to read arbitrary files from the Gradio server, even when Gradio is set up with authentication. ### PoC ``` % curl http://10.10.10.10:7860/static//windows/win.ini ; for 16-bit app support [fonts] [extensions] [mci extensions] [files] [Mail] MAPI=1 ``` ### Impact Arbitrary file read in the context of the Windows user running Gradio.

CVE-2026-28414 Affected Gradio Versions

1 component(s)
Fixed Versions:
6.7.0
Product / Package Ecosystem Affected Versions Fixed Version
gradio
pypi/gradio
PyPI
< 6.7.0
6.7.0

References

GitHub Advisory / Wiki ADVISORY
https://github.com/gradio-app/gradio/security/advisories/GHSA-39mp-8hj3-5c49
NVD — CVE-2026-28414 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28414
Security Fix Commit FIX COMMIT
https://github.com/gradio-app/gradio/commit/6011b00d0154b85532fa901dd73cf8fa7d86fd04
Gradio Source Repository REPOSITORY
https://github.com/gradio-app/gradio
Gradio Source Repository REPOSITORY
https://github.com/pypa/advisory-database/tree/main/vulns/gradio/PYSEC-2026-64.yaml

Frequently Asked Questions

What is CVE-2026-28414?
CVE-2026-28414 is a security vulnerability in Gradio involving Gradio is Vulnerable to Absolute Path Traversal on Windows with Python 3.13+ under CWE-36: Absolute Path Traversal.
Which Gradio versions are affected?
Affected versions include releases prior to 6.7.0 across affected packages: gradio.
What version fixes CVE-2026-28414?
Upgrading to 6.7.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is gradio affected?
Yes, gradio is affected in releases prior to 6.7.0. Upgrade your dependency to 6.7.0 or later.
What is the CVSS score of CVE-2026-28414?
CVE-2026-28414 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
What CWE is associated with CVE-2026-28414?
CVE-2026-28414 is classified under CWE-36: Absolute Path Traversal (The product uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize absolute path sequences such as "/abs/path" that can resolve to a location that is outside of that directory.).
How can I check PyPI dependencies for CVE-2026-28414?
Run the dependency tree command: 'pip show gradio'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-39mp-8hj3-5c49",
  "modified" : "2026-06-06T00:22:19Z",
  "published" : "2026-03-01T01:28:41Z",
  "aliases" : [ "CVE-2026-28414" ],
  "summary" : "Gradio is Vulnerable to Absolute Path Traversal on Windows with Python 3.13+",
  "details" : "### Summary\nGradio apps running on Window with Python 3.13+ are vulnerable to an absolute path traversal issue that enables unauthenticated attackers to read arbitrary files from the file system.\n\n### Details\nPython 3.13+ changed the definition of `os.path.isabs` so that root-relative paths like `/windows/win.ini` on Windows are no longer considered absolute paths, resulting in a vulnerability in Gradio's logic for joining paths safely.\n\nThis can be exploited by unauthenticated attackers to read arbitrary files from the Gradio server, even when Gradio is set up with authentication.\n\n### PoC\n```\n% curl http://10.10.10.10:7860/static//windows/win.ini\n; for 16-bit app support\n[fonts]\n[extensions]\n[mci extensions]\n[files]\n[Mail]\nMAPI=1\n```\n\n### Impact\nArbitrary file read in the context of the Windows user running Gradio.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "gradio"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "6.7.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/gradio-app/gradio/security/advisories/GHSA-39mp-8hj3-5c49"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-28414"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/gradio-app/gradio/commit/6011b00d0154b85532fa901dd73cf8fa7d86fd04"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/gradio-app/gradio"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/pypa/advisory-database/tree/main/vulns/gradio/PYSEC-2026-64.yaml"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-22", "CWE-36" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-03-01T01:28:41Z",
    "nvd_published_at" : "2026-02-27T22:16:24Z"
  }
}