CVE-2026-0858: XSS
Versions of the package net.sourceforge.plantuml:plantuml before 1.2026.0 are vulnerable to Stored XSS due to insufficient sanitization of interactive attributes in GraphViz diagrams. As a result, a crafted PlantUML diagram can inject malicious JavaScript into generated SVG output, leading to arbitrary script execution in the context of applications that render the SVG.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2026-0858?
CVE-2026-0858 has a medium severity due to the potential for stored XSS attacks through malicious GraphViz diagrams.
How do I fix CVE-2026-0858?
To fix CVE-2026-0858, upgrade the package net.sourceforge.plantuml:plantuml to version 1.2026.0 or later.
What software is affected by CVE-2026-0858?
CVE-2026-0858 affects versions of net.sourceforge.plantuml:plantuml prior to 1.2026.0.
What type of vulnerability is CVE-2026-0858?
CVE-2026-0858 is a stored cross-site scripting (XSS) vulnerability.
What damage can CVE-2026-0858 cause?
CVE-2026-0858 can lead to the injection of malicious JavaScript into SVG output, compromising user data.