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Vulnerability · Published May 27, 2026 · Assigned by VulnCheck

CVE-2026-48545Gradio < 6.15.0 Cookie Injection via Shared Proxy Client

Medium 6.8

In plain English

A medium-severity session fixation in gradio from gradio-app. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.8Medium
Exploit odds (30 days)0.4%top 71.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
PyPIgradio6.15.0GHSA-7hp7-4p35-3cx2
PyPIgradio6.15.0PYSEC-2026-2178

Affected products (as reported)

VendorProductVersions
gradio-app gradio 0 – before 6.15.0

Weakness: CWE-384 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

References