CVE-2026-48545
Gradio < 6.15.0 Cookie Injection via Shared Proxy Client
CVSS Score
6.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-384 |
| Vendor | gradio-app |
| Product | gradio |
| Published | May 27, 2026 |
| Last Updated | May 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
gradio-app / gradio
0 < 6.15.0
References
github.com: https://github.com/gradio-app/gradio/releases/tag/gradio%406.15.0 github.com: https://github.com/gradio-app/gradio/issues/13369 github.com: https://github.com/gradio-app/gradio/pull/13384 github.com: https://github.com/gradio-app/gradio/commit/feb7237d01f359d2ad4ee42d00344e61692b3b39 vulncheck.com: https://www.vulncheck.com/advisories/gradio-cookie-injection-via-shared-pro
Credits
YU SUN