CVE-2026-48545
Gradio < 6.15.0 Cookie Injection via Shared Proxy Client
- State
- Published
- Severity
- 7.6 High
- Published
- May 27, 2026
- Updated
- Oct 8, 2026
- Reserved
- May 21, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.6 High | 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 | VulnCheck |
| 3.1 | 6.8 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N | VulnCheck |
Weaknesses
- CWE-384 Session Fixation
Affected Products
| Product | Versions |
|---|---|
gradiogradio-app |
|
References
- https://github.com/gradio-app/gradio/releases/tag/gradio%406.15.0release-notes
- https://github.com/gradio-app/gradio/issues/13369issue-tracking
- https://github.com/gradio-app/gradio/pull/13384issue-tracking
- https://github.com/gradio-app/gradio/commit/feb7237d01f359d2ad4ee42d00344e61692b3b39patch
- https://www.vulncheck.com/advisories/gradio-cookie-injection-via-shared-prothird-party-advisory
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