SB2026082158 - Multiple vulnerabilities in draw.io

Description

This security bulletin contains information about 2 vulnerabilities.

1) Resource exhaustion (CVE-ID: N/A)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in mxGraph.prototype.updatePageBreaks when rendering a diagram with extreme cell coordinates. A remote attacker can supply a specially crafted diagram file or update response to cause a denial of service.

User interaction is required to open a crafted file or follow a link that loads attacker-controlled diagram content.

2) Server-Side Request Forgery (SSRF) (CVE-ID: N/A)

CWE-ID: CWE-918 - Server-Side Request Forgery (SSRF)

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N]

The vulnerability allows a remote attacker to send server-side requests to internal CGNAT hosts.

The vulnerability exists due to improper input validation in ProxyServlet / Utils.sanitizeUrl when handling requests to the optional /proxy endpoint. A remote attacker can send a specially crafted request to send server-side requests to internal CGNAT hosts.

Only instances with ENABLE_DRAWIO_PROXY=1 are vulnerable.

Remediation

Install update from vendor's website.

References

• https://github.com/jgraph/drawio/security/advisories/GHSA-ghcc-x248-vj2j
• https://github.com/jgraph/drawio/security/advisories/GHSA-xc39-mcq4-fr4q