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.

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact Low

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact High

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
BuilderIO @builder.io/sdk-react unaffected
Version Status Constraints
0 affected ≤ 5.2.11
BuilderIO @builder.io/sdk-vue unaffected
Version Status Constraints
0 affected ≤ 5.2.11
BuilderIO @builder.io/sdk-svelte unaffected
Version Status Constraints
0 affected ≤ 5.2.11
BuilderIO @builder.io/sdk-solid unaffected
Version Status Constraints
0 affected ≤ 5.2.11
BuilderIO @builder.io/sdk-qwik unaffected
Version Status Constraints
0 affected ≤ 0.25.13
BuilderIO @builder.io/sdk-angular unaffected
Version Status Constraints
0 affected ≤ 0.25.13
BuilderIO @builder.io/sdk-react-nextjs unaffected
Version Status Constraints
0 affected ≤ 0.25.13

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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

Wed, 16 Sep 2026 20:45:00 +0000

Type Values Removed Values Added
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.
Title Builder.io Gen2 SDKs through 5.2.11 Prototype Pollution via Bindings
Weaknesses CWE-1321
References
Metrics cvssV3_1

{'score': 7.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L'}

cvssV4_0

{'score': 7.2, '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'}

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-09-16T20:32:37.544Z

Reserved: 2026-09-16T19:22:53.082Z

Link: CVE-2026-92779

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-16T21:17:26.827

Modified: 2026-09-16T21:17:26.827

Link: CVE-2026-92779

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses