CVE-2026-92779CWE-1321

CVE-2026-92779

High · published September 17, 2026

CVSS v3.1
7.6
EPSS
0%
Percentile
41.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.6 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
CVSS v4.0
7.2 · 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
EPSS
0.00491 · 41.2th percentile
Weakness
CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Published
2026-09-17T01:17Z
References (5)
https://github.com/BuilderIO/builder · [email protected]https://github.com/BuilderIO/builder/blob/main/packages/sdks/src/functions/get-processed-block.ts#L84-L93 · [email protected]https://github.com/BuilderIO/builder/blob/main/packages/sdks/src/functions/set.ts#L7-L26 · [email protected]https://github.com/BuilderIO/builder/issues/4823 · [email protected]https://www.vulncheck.com/advisories/builder-io-gen2-sdks-through-5.2.11-prototype-pollution-via-bindings · [email protected]
EPSS history
Timeline
  • 18 SEP 04:02Z
    EPSS moved — → 0%
    epss
  • 16 SEP 20:32Z
    Builder.io Gen2 SDKs through 5.2.11 Prototype Pollution via Bindings
    cvelistv5