Is CVE-2026-27167 actively exploited?

No active exploitation of CVE-2026-27167 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27167 be exploited remotely?

Yes. CVE-2026-27167 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-27167?

CVE-2026-27167 has a CVSS score of 5.9 (MEDIUM).

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MEDIUM

CVE-2026-27167

CWE-522Published: February 27, 2026· Updated: Mar 5, 2026

5.9

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:12.0th

Official Description

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. `gr.LoginButton`) are used. When a user visits `/login/huggingface`, the server retrieves its own Hugging Face access token via `huggingface_hub.get_token()` 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 `"-v4"`, making the payload trivially decodable. Version 6.6.0 fixes the issue.

NVD Source

Technical Analysis

CVE-2026-27167 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.9.