# CVE-2025-11539: Arbitrary Code Execution in Grafana Image Renderer Plugin

> Attackers can execute arbitrary code by writing malicious files via the CSV endpoint if the default authentication token is unchanged.

- **Severity:** Critical 9.9 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 9 Oct 2025
- **Updated:** 26 Feb 2026
- **Also known as:** BIT-grafana-image-renderer-2025-11539

## What is CVE-2025-11539?

CVE-2025-11539 is a critical code injection vulnerability in grafana-image-renderer, published on 9 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.

### Official 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.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2025-11539?

1 open source package ship an affected version, including grafana-image-renderer.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `grafana-image-renderer` | Bitnami | From 1.0.0 | 4.0.17 |

## How do I fix CVE-2025-11539?

Upgrade grafana-image-renderer to 4.0.17 or later.

## Is CVE-2025-11539 being exploited?

There is no known exploitation of CVE-2025-11539 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-11539 and fix it if it is affected.

What it is: CVE-2025-11539 is a critical code injection vulnerability in grafana-image-renderer, published on 9 Oct 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-11539 in the wild and no public exploit code.

Affected packages and fixed versions:
- grafana-image-renderer (Bitnami): affected from 1.0.0; fixed in 4.0.17

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-11539/ (Markdown: https://insights.sbomify.com/CVE-2025-11539/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-11539
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-11539
- OSV: https://osv.dev/vulnerability/CVE-2025-11539

---
From sbomify Insights: https://insights.sbomify.com/CVE-2025-11539/
Summaries are generated and may contain mistakes; the official description above is the record.