Security readout for executives and security teams
Plain-English summary
CVE-2026-28414 affects Gradio applications on Windows when running Python 3.13 or newer. An unauthenticated attacker could read arbitrary files from the server, even if the Gradio app uses authentication. The issue is fixed in Gradio 6.7.
Executive priority
Treat as a high-priority confidentiality issue for affected Gradio deployments. The main business risk is unauthorized disclosure of server-side files, potentially including secrets or sensitive data. Remediation is straightforward if upgrade is feasible.
Technical view
Gradio before 6.7 mishandles Windows root-relative paths under Python 3.13+ because Python changed os.path.isabs behavior. Gradio’s safe path-joining logic can treat paths like /windows/win.ini incorrectly, enabling absolute path traversal and arbitrary file read. CVSS is 7.5 with network, low-complexity, no-auth exploitation and high confidentiality impact.
Likely exposure
Exposure is limited to Gradio versions before 6.7 running on Windows with Python 3.13 or newer. Internet-facing or internally reachable Gradio apps are higher concern. The advisory states Gradio authentication does not prevent this file-read issue.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not marked as KEV. Exploitation is described as unauthenticated, network-accessible, and low complexity, but only confidentiality impact is identified.
Researcher notes
Scope is specific: Gradio <6.7, Windows, Python 3.13+. The root cause is path classification drift in os.path.isabs affecting safe path joins. Evidence supports arbitrary file read, not code execution, integrity impact, or availability impact.
Mitigation direction
- Upgrade Gradio to version 6.7 or later.
- Prioritize Windows Gradio hosts running Python 3.13 or newer.
- Avoid exposing affected Gradio apps to untrusted networks until upgraded.
- Review the GitHub advisory for any updated vendor guidance.
Validation and detection
- Inventory Gradio deployments and dependency versions.
- Confirm whether each deployment runs on Windows.
- Confirm whether Python version is 3.13 or newer.
- Verify Gradio is upgraded to 6.7 or later.
- Assess whether affected apps are reachable by untrusted users.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-36: Exact CWE lookup
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Open ATT&CK lookupFile access behavior lookup
The CVE wording references file access or upload behavior, so file telemetry and web shell review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2026-28414 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/gradio-app/gradio/security/advisories/GHSA-39mp-8hj3-5c49CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Absolute Path Traversal
Absolute Path Traversal represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.