CVE-2026-48545

Gradio < 6.15.0 Cookie Injection via Shared Proxy Client

Published May 27, 2026 CVSS 4.0 · 7.6 High EPSS < 1% KEV · Not listed
Description
Gradio before version 6.15.0 contains a cookie injection vulnerability that allows remote attackers to perform cross-Space session fixation by exploiting a shared module-level HTTP client used across all users in the reverse proxy endpoint. Attackers controlling any HF Space can return a parent-domain cookie that the shared client stores and automatically replays into all subsequent proxy requests to other legitimate Spaces, affecting all users of the same Gradio deployment.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-7hp7-4p35-3cx2 Gradio contains a cookie injection vulnerability
History
Type Values Removed Values Added
First Time appeared Gradio Project
Gradio Project gradio
CPEs cpe:2.3:a:gradio_project:gradio:*:*:*:*:*:python:*:*
Vendors & Products Gradio Project
Gradio Project gradio
Type Values Removed Values Added
First Time appeared Gradio-app
Gradio-app gradio
Vendors & Products Gradio-app
Gradio-app gradio
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Gradio before version 6.15.0 contains a cookie injection vulnerability that allows remote attackers to perform cross-Space session fixation by exploiting a shared module-level HTTP client used across all users in the reverse proxy endpoint. Attackers controlling any HF Space can return a parent-domain cookie that the shared client stores and automatically replays into all subsequent proxy requests to other legitimate Spaces, affecting all users of the same Gradio deployment.
Title Gradio < 6.15.0 Cookie Injection via Shared Proxy Client
Weaknesses CWE-384
References
Metrics cvssV3_1

{'score': 6.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N'}

cvssV4_0

{'score': 7.6, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 8, 2026, 2:04 PM
Reserved
May 21, 2026, 6:34 PM
Status
Analyzed
Published
May 27, 2026, 3:16 PM
Modified
Oct 8, 2026, 4:17 PM