medium6.1
CVE-2026-0858
PlantUML is vulnerable to Stored XSS due to insufficient sanitization of interactive attributes in GraphViz diagrams
Impact
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
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | net.sourceforge.plantuml:plantuml | < 1.2026.0 | 1.2026.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Plantuml | Plantuml | before 1.2026.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/plantuml/plantuml/commit/6826315db092d2e432aeab1a0894e08017c6e4bd
- https://github.com/plantuml/plantuml/releases/tag/v1.2026.0
- https://security.snyk.io/vuln/SNYK-JAVA-NETSOURCEFORGEPLANTUML-14552230
- https://github.com/advisories/GHSA-hrvf-g648-rf3m
- https://nvd.nist.gov/vuln/detail/CVE-2026-0858