Vulnerability · Published Sep 21, 2026 · Assigned by GitHub_M

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

Low 3.7

In plain English

A low-severity path traversal in drawio from jgraph. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 26% of all known vulnerabilities).

Severity (CVSS 3.1)3.7Low

Exploit odds (30 days)0.3%top 73.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
jgraph	drawio	< 30.2.7

Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/jgraph/drawio/security/advisories/GHSA-3pq9-9hg4-ggfw x_refsource_CONFIRM
https://github.com/jgraph/drawio/commit/650fbd742814f6502f78248dc2d8e2aaa5e42b5e x_refsource_MISC
https://github.com/jgraph/drawio/releases/tag/v30.2.7 x_refsource_MISC