What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-27 · updated 2026-10-08
• Weakness: CWE-384

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 products

• gradio-app gradio: before 6.15.0 — fixed in 6.15.0

How to fix

Upgrade to a fixed version: gradio-app gradio 6.15.0. Check the vendor advisory for mitigations.

References

• https://github.com/gradio-app/gradio/commit/feb7237d01f359d2ad4ee42d00344e61692b3b39
• https://github.com/gradio-app/gradio/issues/13369
• https://github.com/gradio-app/gradio/pull/13384
• https://github.com/gradio-app/gradio/releases/tag/gradio%406.15.0
• https://www.vulncheck.com/advisories/gradio-cookie-injection-via-shared-pro
• https://github.com/gradio-app/gradio/issues/13369

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