Is CVE-2026-92781 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-92781?

CVE-2026-92781 has a CVSS v3 severity of MEDIUM (6.3).

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CVE-2026-92781

Description

Builder.io Gen2 SDKs through versions 5.2.11 and 0.25.13 contain a prototype pollution vulnerability in the unflatten helper that processes builder.userAttributes query parameters without prototype guards. Attackers can craft preview links with __proto__ or prototype segments to pollute Object.prototype in a visitor's browser when the SDK processes the malicious URL.