Prototype Pollution

Overview org.webjars.npm:mermaid is a package for generation of diagrams and flowcharts from text in a similar manner as markdown. Affected versions of this package are vulnerable to Prototype Pollution via the architecture-beta diagram rendering process. An attacker can inject arbitrary properti...

GHSA-3RRR-JR9J-H3Q3 Mermaid Architecture diagrams are vulnerable to prototype pollution

Rendering an untrusted architecture-beta diagram lets the diagram author write an arbitrary property with the value horizontal or vertical onto Object.prototype. A group id of proto is accepted as a valid parent. Impact Any code in the same realm that reads a property of that name from an arbitra...

Prototype Pollution

Overview mermaid is a package for generation of diagrams and flowcharts from text in a similar manner as markdown. Affected versions of this package are vulnerable to Prototype Pollution via the architecture-beta diagram rendering process. An attacker can inject arbitrary properties with the valu...

Mermaid Architecture diagrams are vulnerable to prototype pollution

Rendering an untrusted architecture-beta diagram lets the diagram author write an arbitrary property with the value horizontal or vertical onto Object.prototype. A group id of proto is accepted as a valid parent. Impact Any code in the same realm that reads a property of that name from an arbitra...

PT-2026-68805

Name of the Vulnerable Software and Affected Versions Mermaid versions 11.5.0 through 11.16.0 Description Mermaid Architecture Diagrams are subject to prototype pollution, a condition where an attacker can manipulate the Object.prototype of the JavaScript environment. This occurs when a diagram...

PT-2026-68932

Rendering an untrusted architecture-beta diagram lets the diagram author write an arbitrary property with the value horizontal or vertical onto Object.prototype. A group id of proto is accepted as a valid parent. Impact Any code in the same realm that reads a property of that name from an arbitra...