CVE-2026-48545
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.
- CVSS 4.0
- 7.6
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 - CVSS 3.1
- 6.8
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N - EPSS
- 0.4% chance of exploitation in the next 30 days; higher than 28% of CVEs (scores of 2026-10-25)
- CWE
- CWE-384
- Published
- Modified
- Record from
- the NVD, synced
Affected
- gradio_project:gradio
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-7hp7-4p35-3cx2 | PyPI | gradio | <6.15.0 | 6.15.0 |
| PYSEC-2026-2178 | PyPI | gradio | <6.15.0 | 6.15.0 |
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