# CVE-2026-63416: draw.io: Path traversal in ExportProxyServlet allows access to arbitrary backend endpoints

> Unauthenticated attackers can use path traversal in the ExportProxyServlet to access internal backend endpoints and inject headers, potentially exposing sensitive configuration or administrative functions.

- **Severity:** Low 3.7 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Sep 2026
- **Updated:** 24 Sep 2026
- **Also known as:** GHSA-3pq9-9hg4-ggfw

## What is CVE-2026-63416?

CVE-2026-63416 is a low-severity path traversal vulnerability in jgraph drawio, published on 21 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

draw.io is a configurable diagramming and whiteboarding application. Prior to version 30.2.7, src/main/java/com/mxgraph/online/ExportProxyServlet.java uses request.getPathInfo() to build a proxyPath and appends it directly to EXPORT_URL without rejecting dot segments or confirming that the normalized destination remains under the configured export path. An unauthenticated request containing traversal segments can therefore address unintended routes on the internal export server, and the servlet forwards all request headers and the request body to that destination, allowing arbitrary header injection. Depending on the export service configuration, exploitation can expose administration, debugging, health, or configuration endpoints and can permit unintended internal actions. This issue is fixed in version 30.2.7.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-63416?


## How do I fix CVE-2026-63416?

No fix has been published for CVE-2026-63416 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-63416 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-63416 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-63416 and fix it if it is affected.

What it is: CVE-2026-63416 is a low-severity path traversal vulnerability in jgraph drawio, published on 21 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-63416 exists.

Affected product: jgraph drawio. No package-level version data is available, so check the vendor advisory linked from the reference page.

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-2026-63416/ (Markdown: https://insights.sbomify.com/CVE-2026-63416/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-63416
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-63416
- OSV: https://osv.dev/vulnerability/CVE-2026-63416

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-63416/
Summaries are generated and may contain mistakes; the official description above is the record.