SB2026082159 - Information disclosure in draw.io

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Main Vulnerability Database SB2026082159

SB2026082159 - Information disclosure in draw.io

Published: August 21, 2026

Security Bulletin ID SB2026082159
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Information disclosure (CVE-ID: N/A)

CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to improper neutralization of external references in Graph.isStyleAllowed when processing CSS in diagram labels. A remote attacker can supply a crafted diagram that triggers external image requests and conditional CSS-based data leakage to disclose sensitive information.

User interaction is required to view a crafted diagram, and the issue is particularly exposed when untrusted diagrams are rendered inline via GraphViewer in a page that contains DOM secrets.


Remediation

Install update from vendor's website.

References