CVE-2026-92779
Builder.io Gen2 SDKs through 5.2.11 Prototype Pollution via Bindings
- State
- Published
- Severity
- 7.2 High
- Published
- Sep 16, 2026
- Updated
- Sep 17, 2026
- Reserved
- Sep 16, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.2 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.6 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L | VulnCheck |
Weaknesses
- CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Affected Products
| Product | Versions |
|---|---|
@builder.io/sdk-reactBuilderIO |
|
@builder.io/sdk-vueBuilderIO |
|
@builder.io/sdk-svelteBuilderIO |
|
@builder.io/sdk-solidBuilderIO |
|
@builder.io/sdk-qwikBuilderIO |
|
@builder.io/sdk-angularBuilderIO |
|
@builder.io/sdk-react-nextjsBuilderIO |
|
References
- GitHub Issue #4823issue-tracking
- https://github.com/BuilderIO/builderproduct
- binding keys from content JSON are used as the write pathtechnical-description
- the deep-set helper has no __proto__ guardtechnical-description
- VulnCheck Advisory: Builder.io Gen2 SDKs through 5.2.11 Prototype Pollution via Bindingsthird-party-advisory
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