CVE-2025-11539: grafana-image-renderer · Code Injection
Affects grafana-image-rendererSource CVE Database V5
Not known to be exploited · CVSS 9.9 Critical.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.6% chance of exploitation in 30 days – higher than 50% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:HExploitation evidence
Disclosed: evidence found.
CVE published 9 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Grafana grafana-image-renderer | Affected
| Fixed in– |
AI-suggested
To mitigate CVE-2025-11539, organizations should take the following specific actions: 1) Immediately change the default authToken used by the grafana-image-renderer to a strong, unique token to prevent unauthorized access. 2) Restrict network access to the /render/csv endpoint by implementing network segmentation, firewall rules, or VPN access to limit exposure to trusted users only. 3) Monitor and audit access logs for any suspicious or unauthorized requests to the image renderer endpoints. 5) Employ runtime application self-protection (RASP) or endpoint detection and response (EDR) solutions to detect anomalous behavior indicative of exploitation attempts. 6) Conduct internal penetration testing focusing on the image renderer endpoints to verify that mitigations are effective. 7) Educate administrators about the risks of default credentials and enforce credential management policies. These steps go beyond generic advice by focusing on access control hardening, proactive monitoring, and immediate credential changes.
Description
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.