CVE-2026-48545

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.

Predictions

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No vendor mitigations ingested yet for this CVE. The mitigation-content worker queues fetches as references arrive — check back in a few minutes, or see the references list below.

References

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

CWEs

CWE-384