[Snyk] Upgrade net.sourceforge.plantuml:plantuml from 1.2023.10-DRAWIO to 1.2026.5

[m-mohamedin]

Snyk has created this PR to upgrade net.sourceforge.plantuml:plantuml from 1.2023.10-DRAWIO to 1.2026.5.

ℹ️ Keep your dependencies up-to-date. This makes it easier to fix existing vulnerabilities and to more quickly identify and fix newly disclosed vulnerabilities when they affect your project.

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• The recommended version is 126 versions ahead of your current version.

• The recommended version was released a month ago.

Issues fixed by the recommended upgrade:

	Issue	Score	Exploit Maturity
	Stored XSS SNYK-JAVA-NETSOURCEFORGEPLANTUML-14552230	500	Proof of Concept

Breaking Change Risk

Notice: This assessment is enhanced by AI.

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[m-mohamedin]

This upgrade from version 1.2023.10 to 1.2026.5 spans multiple years of releases and introduces significant changes, including a key breaking change that will require modifications to existing diagram sources.

High-Impact Breaking Change:

• Backslash Deprecation: Starting with version 1.2025.1, PlantUML began deprecating backslash escape sequences (e.g., \n, \t). These will be removed in a future release. Diagrams using backslashes for newlines or other formatting must be updated to use new built-in functions like %newline() or %n().

Other Potential Issues:

• Behavioral Changes: The extensive changelog between these versions includes numerous bug fixes and feature enhancements that may alter the rendering of some diagrams. For example, a change in how aliases with periods are parsed was noted in version 1.2024.6.
• Command-Line Redesign: As of late 2025, the command-line options were undergoing a redesign, which could impact scripts or build tools that rely on specific CLI arguments.
• Java Version: While PlantUML maintains compatibility with Java 8, Java 11 or newer is recommended.

Recommendation:
Before merging, developers must review their PlantUML diagram sources (.puml files) for deprecated backslash escape sequences and replace them with the new function-based syntax to avoid future failures. Given the large version gap, a thorough visual review of critical diagrams after the upgrade is strongly recommended to catch any unintended rendering changes.

Source: PlantUML Changelog

Notice 🤖: This content was augmented using artificial intelligence. AI-generated content may contain errors and should be reviewed for accuracy before use.