CVE-2026-27167
Gradio is an open-source Python package designed for quick prototyping.
Published Feb 27, 2026 · corrected/updated Jun 17, 2026 · gradio project gradio · evidence confidence medium
Gradio is an open-source Python package designed for quick prototyping. Starting in version 4.16.0 and prior to version 6.6.0, Gradio applications running outside of Hugging Face Spaces automatically enable "mocked" OAuth routes when OAuth components (e.g. ) are used. When a user visits , the server retrieves its own Hugging Face access token via and stores it in the visitor's session cookie. If the application is network-accessible, any remote attacker can trigger this flow to steal the server owner's HF token. The session cookie is signed with a hardcoded secret derived from the string , making the payload trivially decodable. Version 6.6.0 fixes the issue.
Grounded briefings
Catalog interpretations for three audiences. Each brief cites ingested metadata and the original advisories below. They are not independent research and they do not invent exploit steps.
Executive
CVE-2026-27167 is a medium public vulnerability record for gradio project gradio. It is not currently listed in the CISA Known Exploited catalog. Check the linked vendor or CERT advisories for patch status. This summary is a catalog interpretation of the ingested metadata and cites the original advisories below.
System administrator
Identify whether gradio project gradio is in your estate, then compare installed versions with the affected ranges. Affected packages or ranges on record: gradio project/gradio. Check the linked vendor or CERT advisories for patch status. Prefer the vendor or distribution advisory linked in Sources before changing production systems. This is a catalog interpretation, not a runbook.
Security analyst
Signals on file: CVSS 5.9. It is not currently listed in the CISA Known Exploited catalog. Weakness classes: CWE-522, CWE-798. Sources contributing to this record: cve_org, nvd. Public exploit references, when present, are outbound links only and are not proof of active exploitation. This is a catalog interpretation of stored metadata.
Exploitation and remediation
Exploitation evidence
Not listed as known exploited in CISA KEV. Not in CISA KEV or VulnCheck KEV.
Patch and remediation
No required-action text is stored yet. Use the vendor or CERT links in Sources for patch availability.
Safe detection guidance
Compare installed versions with the affected ranges below and verify the advisory from the original publisher. This site stores metadata and outbound links only; it does not ship exploit code or proof-of-concept payloads.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Feb 27, 2026 · NIST NVD
Detected
Gradio is an open-source Python package designed for quick prototyping. Starting in version 4.16.0 and prior to version 6.6.0, Gradio applications running outside of Hugging Face Spaces automatically enable "mocked" OAuth routes when OAuth components (e.g. ) are used. When a user visits , the server retrieves its own Hugging Face access token via and stores it in the visitor's session cookie. If t
Jun 17, 2026 · NIST NVD
Updated
Gradio is an open-source Python package designed for quick prototyping. Starting in version 4.16.0 and prior to version 6.6.0, Gradio applications running outside of Hugging Face Spaces automatically enable "mocked" OAuth routes when OAuth components (e.g. ) are used. When a user visits , the server retrieves its own Hugging Face access token via and stores it in the visitor's session cookie. If t
Affected
- cpe gradio project/gradioversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-27167
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-2026-27167
Gradio is an open-source Python package designed for quick prototyping. Starting in version 4.16.0 and prior to version 6.6.0, Gradio applications running outside of Hugging Face Spaces automatically enable "mocked" OAuth routes when OAuth components (e.g. ) are u
nvd.nist.gov