CVE-2025-11539: Grafana Grafana-Image-Renderer

Critical severity, CVSS 9.9. EPSS: 0.6% chance of exploitation in the next 30 days.

Grafana Image Renderer is vulnerable to remote code execution due to an arbitrary file write vulnerability. This is due to the fact that the /render/csv endpoint lacked validation of the filePath parameter that allowed an attacker to save a shared object to an arbitrary location that is then loaded by the Chromium process. Instances are vulnerable if: 1. The default token ("authToken") is not changed, or is known to the attacker. 2. The attacker can reach the image renderer endpoint. This issue affects grafana-image-renderer: from 1.0.0 through 4.0.16.

Affected products

• Grafana Grafana-Image-Renderer: from 1.0.0, up to and including 4.0.16

Published 2025-10-09. Last modified 2026-10-08.