CVE-2026-0858
Publication date 16 January 2026
Last updated 16 January 2026
Ubuntu priority
Description
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| plantuml | 26.04 LTS resolute |
Needs evaluation
|
| 25.10 questing |
Needs evaluation
|
|
| 24.04 LTS noble |
Needs evaluation
|
|
| 22.04 LTS jammy |
Needs evaluation
|
|
| 20.04 LTS focal |
Needs evaluation
|
|
| 18.04 LTS bionic |
Needs evaluation
|
|
| 16.04 LTS xenial | Ignored end of ESM support, was needs-triage |
Severity score breakdown
CVSS version: CVSS v3.0
Base score
6.1 · Medium
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
References
Other references
- https://www.cve.org/CVERecord?id=CVE-2026-0858
- https://security.snyk.io/vuln/SNYK-JAVA-NETSOURCEFORGEPLANTUML-14552230
- https://github.com/plantuml/plantuml/commit/6826315db092d2e432aeab1a0894e08017c6e4bd (v1.2026.0)
- https://github.com/plantuml/plantuml/commit/6826315db092d2e432aeab1a0894e08017c6e4bd
- https://github.com/plantuml/plantuml/releases/tag/v1.2026.0