EUVD-2026-84009Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Unauthenticated remote SSRF (PR:N) whose scope-changing read of internal systems (S:C/C:H) is gated on the target being IPv6-ULA reachable, warranting AC:H; no integrity or availability impact.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
4DescriptionCVE.org
draw.io is a configurable diagramming and whiteboarding application. Prior to version 30.3.8, src/main/java/com/mxgraph/online/Utils.java checks IPv6 Unique Local Addresses in Utils.sanitizeUrl() by comparing the text prefixes fc00:: and fd00::, but the JDK returns the expanded address form, so the fc00::/7 range, including the AWS metadata range fd00:ec2::/32, is not blocked. An unauthenticated request to /embed2.js?fetch= can therefore make src/main/java/com/mxgraph/online/EmbedServlet2.java fetch an IPv6 ULA internal resource and reflect the response to the requester. Utils.validatedAddress() uses the same private-address check for the separate ProxyServlet path, which requires ENABLE_DRAWIO_PROXY=1. The primary /embed2.js path requires no proxy feature flag or DNS rebinding, and it can disclose cloud metadata credentials or data from other IPv6-reachable internal services. This issue is fixed in version 30.3.8.
Articles & Coverage 1
AnalysisAI
Server-side request forgery in self-hosted draw.io (jgraph/drawio) prior to 30.3.8 lets an unauthenticated remote attacker point the /embed2.js?fetch= endpoint at internal IPv6 Unique Local Address (ULA) resources and read the reflected response, including AWS instance metadata served on the fd00:ec2::/32 range, which can expose IAM credentials and other sensitive internal data. The flaw is a filter bypass rather than a missing check: the private-address guard compared the JDK's fully expanded IPv6 text form against the compressed prefixes 'fc00::' and 'fd00::', so the entire fc00::/7 ULA space slipped through. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires a self-hosted draw.io server (jgraph/drawio prior to 30.3.8) with the /embed2.js fetch endpoint reachable by the attacker; no authentication, no ENABLE_DRAWIO_PROXY=1 flag, and no DNS rebinding are needed on this primary path. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 base score of 7.7 (High) is driven by an unauthenticated network vector (AV:N/PR:N/UI:N) with low attack complexity and a scope-changing confidentiality impact on subsequent systems (SC:H) - consistent with a classic SSRF that reflects internal responses to the attacker. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to draw.io 30.3.8 or later - vendor-released patch: v30.3.8 (https://github.com/jgraph/drawio/releases/tag/v30.3.8), which is the release referenced by the fixing commit 73c4a91196246bbdb60f52b15871e82006b7972d and by advisory GHSA-m3q9-cwfq-hcjc (https://github.com/jgraph/drawio/security/advisories/GHSA-m3q9-cwfq-hcjc); at minimum apply that commit if you build from source, since it both corrects the fc00::/7 byte-level check and pins the validated address to close the DNS-rebinding TOCTOU window. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all self-hosted draw.io instances running versions prior to 30.3.8 and restrict external access to the /embed2.js endpoint, particularly the fetch parameter; implement egress filtering to block the draw.io server from reaching IPv6 Unique Local Address ranges (fc00::/7) and specifically the AWS IPv6 metadata range fd00:ec2::/32. …
Sign in for detailed remediation steps and compensating controls.
Threat intelligence, references, and detailed analysis are available after sign-in.
Oracle Java SE 7 Update 6 and earlier contains multiple sandbox bypass vulnerabilities via the ClassFinder and forName m
Remote code execution in IBM Sterling B2B Integrator, Sterling Integrator, and Tivoli Common Reporting allows unauthenti
Java Runtime Environment sandbox bypass via incorrect image channel verification in 2D component allows remote unauthent
Oracle Java SE JDK/JRE 7 and 6 Update 27 and earlier allows remote code execution with complete system compromise throug
JBoss Seam 2 in Red Hat JBoss EAP 4.3.0 fails to sanitize JBoss Expression Language inputs, allowing remote attackers to
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 update 4 and earlier, 6 up
Multiple vulnerabilities in Oracle Java 7 before Update 11 allow remote attackers to execute arbitrary code by (1) using
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 2 and earlier, 6 Up
The WLS Security component in Oracle WebLogic Server 10.3.6.0, 12.1.2.0, 12.1.3.0, and 12.2.1.0 allows remote attackers
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 7 and earlier allow
Remote unauthenticated attackers can execute arbitrary code on Adobe ColdFusion servers through Java deserialization fla
The ExceptionDelegator component in Apache Struts before 2.2.3.1 interprets parameter values as OGNL expressions during
Same weakness CWE-918 – Server-Side Request Forgery (SSRF)
View allShare
External POC / Exploit Code
Leaving vuln.today