CVE-2026-0858
January 16, 2026
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 Packages
https://github.com/plantuml/plantuml.git (GITHUB):
Affected version(s) >=v1.2017.12 <v1.2026.0Fix Suggestion:
Update to version v1.2026.0net.sourceforge.plantuml:plantuml (JAVA):
Affected version(s) >=1.2017.12 <1.2026.0Fix Suggestion:
Update to version 1.2026.0Related Resources (4)
Do you need more information?
Contact UsCVSS v4
Base Score:
2
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
ACTIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
Exploit Maturity
POC
CVSS v3
Base Score:
4.7
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
EPSS
Base Score:
0.01
