GHSA-39mp-8hj3-5c49 — high GitHub Advisory (CVE-2026-28414) in pip/gradio

Description

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.

Basic information

Type: reviewed
Severity: high
Advisory on GitHub: Open advisory ↗
Repository advisory: Open repository advisory ↗
Source code: Browse source ↗
Published (advisory): 2026-03-01 01:28:41 UTC
Updated: 2026-06-06 00:22:20 UTC
GitHub reviewed: 2026-03-01 01:28:41 UTC
NVD published: 2026-02-27

Score	Percentile
4.21%	88.87%

CVSS Scores

Base score	Version	Severity	Vector
7.5	3.1	—	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:N) Nobody has to click “OK” or open a trap file; it can work without a victim helping. Scope (S:U) Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems. Confidentiality (C:H) Serious risk that confidential data gets exposed in a big way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:N) Service keeps running; no real outage angle.

Identifiers

Type	Value
GHSA	GHSA-39mp-8hj3-5c49 ↗
CVE	CVE-2026-28414 ↗

CWEs

CWE id	Name
CWE-22	Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-36	Absolute Path Traversal

Credits

nvn1729 (reporter)

Affected packages (1)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem	Package	Vulnerable range	First patched	Vulnerable functions
pip	gradio	< 6.7.0	6.7.0	—

Gradio is Vulnerable to Absolute Path Traversal on Windows with Python 3.13+