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CVE PROGRAM SOURCE RECORD5.3 Medium

CVE-2026-92781

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

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Status
Published
Published
Updated
Assigning organization
VulnCheck

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

BuilderIO @builder.io/sdk-react

Default version status: unaffected

  • 0 to ≤ 5.2.11affected
pkg:npm/%40builder.io/sdk-react

BuilderIO @builder.io/sdk-vue

Default version status: unaffected

  • 0 to ≤ 5.2.11affected
pkg:npm/%40builder.io/sdk-vue

BuilderIO @builder.io/sdk-svelte

Default version status: unaffected

  • 0 to ≤ 5.2.11affected
pkg:npm/%40builder.io/sdk-svelte

BuilderIO @builder.io/sdk-solid

Default version status: unaffected

  • 0 to ≤ 5.2.11affected
pkg:npm/%40builder.io/sdk-solid

BuilderIO @builder.io/sdk-qwik

Default version status: unaffected

  • 0 to ≤ 0.25.13affected
pkg:npm/%40builder.io/sdk-qwik

BuilderIO @builder.io/sdk-angular

Default version status: unaffected

  • 0 to ≤ 0.25.13affected
pkg:npm/%40builder.io/sdk-angular

BuilderIO @builder.io/sdk-react-nextjs

Default version status: unaffected

  • 0 to ≤ 0.25.13affected
pkg:npm/%40builder.io/sdk-react-nextjs

References