PT-2026-22405 · Gradio · Gradio

Tenbbughunters · CVE-2026-27167 · Published 2026-02-27 · Updated 2026-03-05

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Gradio versions 4.16.0 through 6.5.9

Description Gradio is a Python package for rapid prototyping. Applications running outside of Hugging Face Spaces, versions 4.16.0 through 6.5.9, improperly handle OAuth components like gr.LoginButton. Visiting the /login/huggingface API endpoint triggers a process where the server retrieves and stores its Hugging Face access token in a session cookie. This cookie, signed with a hardcoded secret ("-v4"), can be decoded by remote attackers, potentially leading to credential theft. The vulnerable process occurs when an application is accessible over a network.

Recommendations Update to Gradio version 6.6.0 or later.

Exploit

Fix

Insufficiently Protected Credentials

Using Hardcoded Credentials

Weakness Enumeration

CWE-522

CWE-798

Related Identifiers

CVE-2026-27167

GHSA-H3H8-3V2V-RG7M

PYSEC-2026-63

Affected Products

Gradio

References · 15

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27167.json · Exploit
• https://github.com/gradio-app/gradio/security/advisories/GHSA-h3h8-3v2v-rg7m · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-27167 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-h3h8-3v2v-rg7m · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-27167 · Security Note
• https://osv.dev/vulnerability/PYSEC-2026-63 · Vendor Advisory
• https://github.com/gradio-app/gradio · Note
• https://github.com/gradio-app/gradio/commit/dfee0da06d0aa94b3c2684131e7898d5d5c1911e · Note
• https://github.com/gradio-app/gradio/releases/tag/gradio@6.6.0 · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/gradio/PYSEC-2026-63.yaml · Note
• https://t.me/CVEtracker/46015 · Telegram Post
• https://t.me/cveNotify/153589 · Telegram Post
• https://twitter.com/CVEnew/status/2027744228319670414 · Twitter Post
• https://t.me/cveNotify/154316 · Telegram Post
• https://twitter.com/_cvereports/status/2027914305434267949 · Twitter Post