CVE-2026-63334

MEDIUMPre-NVD 6.86.8—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 78% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
6.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
6.8
EG Score
6.8(medium)
EG Risk
47(Track)
EG Risk 47/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity68% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

September 21, 2026

Last Modified

September 23, 2026

Advisory Details (2)

Auto-updated Sep 21, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_release.
github_release Patch Available

v30.2.7

Patch available: jgraph/drawio v30.2.7

https://github.com/jgraph/drawio/releases/tag/v30.2.7
github Patch Available🟡 PoC Available

SSRF via DNS rebinding in ProxyServlet bypasses private IP blocklist · Advisory · jgraph/drawio · GitHub

https://github.com/jgraph/drawio/security/advisories/GHSA-3v4h-8r2c-m8c5

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 9× in last 7d / 9× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-24 19:14 UTCEG score recompute
  2. 2026-09-23 18:39 UTCEG score recompute
  3. 2026-09-23 17:54 UTCEPSS rescore
  4. 2026-09-22 20:04 UTCEG score recompute
  5. 2026-09-21 19:29 UTCEG score recompute
  6. 2026-09-21 19:00 UTCEG score recompute
  7. 2026-09-21 17:25 UTCEG score recompute
  8. 2026-09-21 16:35 UTCEG score recompute
  9. 2026-09-21 16:35 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-63334?
CVE-2026-63334 is a medium vulnerability published on September 21, 2026. draw.io is a configurable diagramming and whiteboarding application. Prior to version 30.2.7, deployments with ENABLEDRAWIOPROXY=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…
When was CVE-2026-63334 disclosed?
CVE-2026-63334 was first published in the National Vulnerability Database on September 21, 2026, with the most recent update on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63334 actively exploited?
CVE-2026-63334 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 78.3% of all scored CVEs.
What is the CVSS score of CVE-2026-63334?
CVE-2026-63334 has a CVSS v3 base score of 6.8 (NVD).
How do I remediate CVE-2026-63334?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63334, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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