Answer in brief
CVE-2026-92781 records a Unknown severity vulnerability in Builder.io Gen2 SDKs through 5.2.11 Prototype Pollution via builder.userAttributes. The current sources do not mark it as known exploited. The current feed maps BuilderIO/@builder.io/sdk-angular (generic), BuilderIO/@builder.io/sdk-qwik (generic), BuilderIO/@builder.io/sdk-react (generic), BuilderIO/@builder.io/sdk-react-nextjs (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps BuilderIO/@builder.io/sdk-angular (generic), BuilderIO/@builder.io/sdk-qwik (generic), BuilderIO/@builder.io/sdk-react (generic), BuilderIO/@builder.io/sdk-react-nextjs (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| BuilderIO/@builder.io/sdk-angulargeneric | 0 | Not reported |
| BuilderIO/@builder.io/sdk-qwikgeneric | 0 | Not reported |
| BuilderIO/@builder.io/sdk-reactgeneric | 0 | Not reported |
| BuilderIO/@builder.io/sdk-react-nextjsgeneric | 0 | Not reported |
| BuilderIO/@builder.io/sdk-solidgeneric | 0 | Not reported |
| BuilderIO/@builder.io/sdk-sveltegeneric | 0 | Not reported |
| BuilderIO/@builder.io/sdk-vuegeneric | 0 | Not reported |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
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.
Quoted source text, attributed separately from HOL analysis.