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CVE-2026-15598 is a prototype pollution vulnerability in antv layout 2.0.0. The flaw is in the setNestedValue function in lib/util/object.js, where attacker-controlled path input is not properly restricted before being used to assign nested object properties. By supplying a crafted path that targets prototype-related properties, an attacker can cause improperly controlled modification of object prototype attributes. Because the vulnerable operation can be reached with remote input, the issue may allow untrusted data to alter inherited properties across application objects, depending on how the library is used by the consuming application.
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