CVE-2026-63334

6.8 MEDIUMpublic exploit available

Published 2026-09-21 · Updated 2026-09-21

AI risk analysis

Summary: The flaw allows an attacker to forge server-side requests by manipulating DNS resolutions, potentially exposing internal network resources through a proxy.
Exploitability: Exploitation requires control over the hostname and access to the affected version of draw.io; moderate difficulty due to dependency on DNS resolution discrepancies.
Blast radius: If exploited, it could lead to unauthorized access to cloud metadata or internal HTTP services within the network.
Prioritized remediation: Update to draw.io version 30.2.7 or later to mitigate the vulnerability.

ssrfdns-resolutioninternal-exposureproxy-vulnerability

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

draw.io is a configurable diagramming and whiteboarding application. Prior to version 30.2.7, deployments with ENABLE_DRAWIO_PROXY=1 are vulnerable to server-side request forgery because src/main/java/com/mxgraph/online/Utils.java performs the private-address check in Utils.sanitizeUrl() using one DNS resolution, while src/main/java/com/mxgraph/online/ProxyServlet.java later calls URL.openConnection() and performs a second resolution. An attacker-controlled hostname can resolve to a public address during validation and then to a private, link-local, or cloud metadata address when the connection is opened. Successful exploitation can return cloud instance metadata or responses from internal HTTP services through the proxy. This issue is fixed in version 30.2.7.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N

Weaknesses

CWE-367, CWE-918

Public exploit & PoC references

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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