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CVE-2026-92781

Builder.io Gen2 SDKs through 5.2.11 Prototype Pollution via builder.userAttributes

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.

CVSS 4.0 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Builderio
Products
Sdk-angular Sdk-qwik Sdk-react and 4 more
CVE-2026-92779

Builder.io Gen2 SDKs through 5.2.11 Prototype Pollution via Bindings

Builder.io Gen2 SDKs through versions 5.2.11 and 0.25.13 contain a prototype pollution vulnerability in the deep-set helper function that processes content block bindings without validation. Attackers can craft content blocks with binding keys containing __proto__, prototype, or constructor paths to pollute Object.prototype during rendering, affecting all subsequent objects created in the process including other tenants' renders.

CVSS 4.0 · 7.2 High EPSS < 1% KEV · Not listed
Vendors
Builderio
Products
Sdk-angular Sdk-qwik Sdk-react and 4 more