Vulnerability in Gradio-App Gradio
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.005 · change: +0.001
Affected products
- Gradio-App Gradio — versions 0
- Gradio Project
Weakness classification (CWE)
References
- github.com/gradio-app/gradio/commit/feb7237d01f359d2ad4ee42d00344e61692b3b39 (Patch, patch)
- github.com/gradio-app/gradio/issues/13369 (issue-tracking, technical-description, Issue Tracking)
- github.com/gradio-app/gradio/pull/13384 (issue-tracking, Patch, Issue Tracking)
- github.com/gradio-app/gradio/releases/tag/gradio@6.15.0 (release-notes, Product, Release Notes)
- www.vulncheck.com/advisories/gradio-cookie-injection-via-shared-pro (Broken Link, third-party-advisory)
Frequently asked questions
- What is CVE-2026-48545?
- CVE-2026-48545 is a medium-severity vulnerability in Gradio-App Gradio, classified under Session Fixation. CVSS score: 6.8/10. Published 2026-05-27.
- How severe is CVE-2026-48545?
- Medium severity. CVSS v3 base score is 6.8 out of 10.