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TI-2026-00639 Aliases CVE-2026-0858GHSA-hrvf-g648-rf3m

Cross-site scripting in net.sourceforge.plantuml:plantuml

Priority LOW 23CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
None · Low · None
Fix status
Partial Red Hat: 1 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00338 27th percentileScored 2026-11-07
Fix Partial net.sourceforge.plantuml:plantuml: 1.2026.0net.sourceforge.plantuml:plantuml (Maven): 1.2026.0Red Hat: 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
—net.sourceforge.plantuml:plantumlbefore 1.2026.01.2026.0Patch availableCNA
—net.sourceforge.plantuml:plantuml (Maven)before 1.2026.01.2026.0Patch availableGHSA-hrvf-g648-rf3m
  • net.sourceforge.plantuml:plantuml Vendor— Affected before 1.2026.0 Fixed in 1.2026.0 Patch available CNA
  • net.sourceforge.plantuml:plantuml (Maven) Vendor— Affected before 1.2026.0 Fixed in 1.2026.0 Patch available GHSA-hrvf-g648-rf3m

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:plantuml:plantuml:*:*:*:*:*:*:*:*before 1.2026.0Vulnerableplantuml
  • cpe:2.3:a:plantuml:plantuml:*:*:*:*:*:*:*:* Versions before 1.2026.0 Vulnerable ·plantuml

Remediation

  • Fix · CNA net.sourceforge.plantuml:plantuml Fixed in 1.2026.0
  • Fix · GHSA-hrvf-g648-rf3m net.sourceforge.plantuml:plantuml (Maven) Fixed in 1.2026.0 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
OpenShift Service Mesh 2AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-0858
  2. 2026-10-03 Alias added: GHSA-hrvf-g648-rf3m

References

Patch 1

Advisory 1

Other 2

  • TI-2023-03207 Server-Side Request Forgery (SSRF) in plantuml/plantuml CVSS 3.1CRITICAL 10.0
  • TI-2022-01260 URL Restriction Bypass in plantuml/plantuml CVSS 3.1CRITICAL 9.1
  • TI-2022-01118 XSS via Embedded SVG in SVG Diagram Format in plantuml/plantuml CVSS 3.1MEDIUM 6.1
  • TI-2023-03206 Improper Access Control in plantuml/plantuml CVSS 3.1MEDIUM 5.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences