Vulnerability details
CVE-2026-92779
BuilderIO @builder.io/sdk-angularBuilderIO @builder.io/sdk-qwikBuilderIO @builder.io/sdk-reactBuilderIO @builder.io/sdk-react-nextjsBuilderIO @builder.io/sdk-solidBuilderIO @builder.io/sdk-svelte
Builder.io Gen2 SDKs through 5.2.11 Prototype Pollution via Bindings
CVSS 4.0
7.2High
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.2High | 4.0 | CVEProject cvelistV5 (CNA) (VulnCheck) | 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 |
| 7.6High | 3.1 | CVEProject cvelistV5 (CNA) (VulnCheck) | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| BuilderIO | @builder.io/sdk-angular | v ≤ 0.25.13 | CVEProject cvelistV5 (CNA) |
| BuilderIO | @builder.io/sdk-qwik | v ≤ 0.25.13 | CVEProject cvelistV5 (CNA) |
| BuilderIO | @builder.io/sdk-react | v ≤ 5.2.11 | CVEProject cvelistV5 (CNA) |
| BuilderIO | @builder.io/sdk-react-nextjs | v ≤ 0.25.13 | CVEProject cvelistV5 (CNA) |
| BuilderIO | @builder.io/sdk-solid | v ≤ 5.2.11 | CVEProject cvelistV5 (CNA) |
| BuilderIO | @builder.io/sdk-svelte | v ≤ 5.2.11 | CVEProject cvelistV5 (CNA) |
| BuilderIO | @builder.io/sdk-vue | v ≤ 5.2.11 | CVEProject cvelistV5 (CNA) |
References and advisories
5- https://github.com/BuilderIO/builder/issues/4823 issue-tracking
- https://github.com/BuilderIO/builder product
- https://github.com/BuilderIO/builder/blob/main/packages/sdks/src/functions/get-processed-block.ts#L84-L93 technical-description
- https://github.com/BuilderIO/builder/blob/main/packages/sdks/src/functions/set.ts#L7-L26 technical-description
- https://www.vulncheck.com/advisories/builder-io-gen2-sdks-through-5.2.11-prototype-pollution-via-bindings third-party-advisory
Kolun on Telegram @kolunsec
Exploited CVEs, key news and a daily digest
Alerts for this product's next CVEsFollow the product to get new vulnerabilities on Telegram.
Details
- Published
- 2026-09-17
- Last updated
- 2026-09-17
- State
- Published
- Assigner (CNA)
- VulnCheck
Exploit prediction (EPSS)
0.49%
Probability of exploitation in 30 days
42.4%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Partial
Weaknesses (CWE)
- CWE-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')