What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-16 · updated 2026-09-24
• Weakness: CWE-1321

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.

Affected products

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

References

• 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://github.com/BuilderIO/builder/issues/4823
• https://www.vulncheck.com/advisories/builder-io-gen2-sdks-through-5.2.11-prototype-pollution-via-bindings

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