Vulnerability-Lookup

GHSA-4QMR-G3PC-XVHM

Vulnerability from github – Published: 2026-09-16 21:32 – Updated: 2026-09-16 21:32

Details

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.

Severity

7.6 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

7.2 (High)


                  
                    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

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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-92779"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1321"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-16T21:17:26Z",
    "severity": "HIGH"
  },
  "details": "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\u0027 renders.",
  "id": "GHSA-4qmr-g3pc-xvhm",
  "modified": "2026-09-16T21:32:54Z",
  "published": "2026-09-16T21:32:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-92779"
    },
    {
      "type": "WEB",
      "url": "https://github.com/BuilderIO/builder/issues/4823"
    },
    {
      "type": "WEB",
      "url": "https://github.com/BuilderIO/builder"
    },
    {
      "type": "WEB",
      "url": "https://github.com/BuilderIO/builder/blob/main/packages/sdks/src/functions/get-processed-block.ts#L84-L93"
    },
    {
      "type": "WEB",
      "url": "https://github.com/BuilderIO/builder/blob/main/packages/sdks/src/functions/set.ts#L7-L26"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/builder-io-gen2-sdks-through-5.2.11-prototype-pollution-via-bindings"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L",
      "type": "CVSS_V3"
    },
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-92779 (GCVE-0-2026-92779)

Vulnerability from cvelistv5 – Published: 2026-09-16 20:32 – Updated: 2026-09-16 20:32

Title

Builder.io Gen2 SDKs through 5.2.11 Prototype Pollution via Bindings

Summary

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.

Severity

7.2 (High)


                        
                          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

7.6 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

CWE

CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Assigner

VulnCheck mitre root

References

5 references

URL	Tags
https://github.com/BuilderIO/builder/issues/4823	issue-tracking
https://github.com/BuilderIO/builder	product
https://github.com/BuilderIO/builder/blob/main/pa…	technical-description
https://github.com/BuilderIO/builder/blob/main/pa…	technical-description
https://www.vulncheck.com/advisories/builder-io-g…	third-party-advisory

Impacted products

7 products

Vendor	Product	Version
BuilderIO	@builder.io/sdk-react	Affected: 0 , ≤ 5.2.11 (semver)
BuilderIO	@builder.io/sdk-vue	Affected: 0 , ≤ 5.2.11 (semver)
BuilderIO	@builder.io/sdk-svelte	Affected: 0 , ≤ 5.2.11 (semver)
BuilderIO	@builder.io/sdk-solid	Affected: 0 , ≤ 5.2.11 (semver)
BuilderIO	@builder.io/sdk-qwik	Affected: 0 , ≤ 0.25.13 (semver)
BuilderIO	@builder.io/sdk-angular	Affected: 0 , ≤ 0.25.13 (semver)
BuilderIO	@builder.io/sdk-react-nextjs	Affected: 0 , ≤ 0.25.13 (semver)

Date Public

2026-08-25 00:00

Credits

George Chen

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:npm/%40builder.io/sdk-react",
          "product": "@builder.io/sdk-react",
          "vendor": "BuilderIO",
          "versions": [
            {
              "lessThanOrEqual": "5.2.11",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:npm/%40builder.io/sdk-vue",
          "product": "@builder.io/sdk-vue",
          "vendor": "BuilderIO",
          "versions": [
            {
              "lessThanOrEqual": "5.2.11",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:npm/%40builder.io/sdk-svelte",
          "product": "@builder.io/sdk-svelte",
          "vendor": "BuilderIO",
          "versions": [
            {
              "lessThanOrEqual": "5.2.11",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:npm/%40builder.io/sdk-solid",
          "product": "@builder.io/sdk-solid",
          "vendor": "BuilderIO",
          "versions": [
            {
              "lessThanOrEqual": "5.2.11",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:npm/%40builder.io/sdk-qwik",
          "product": "@builder.io/sdk-qwik",
          "vendor": "BuilderIO",
          "versions": [
            {
              "lessThanOrEqual": "0.25.13",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:npm/%40builder.io/sdk-angular",
          "product": "@builder.io/sdk-angular",
          "vendor": "BuilderIO",
          "versions": [
            {
              "lessThanOrEqual": "0.25.13",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "packageURL": "pkg:npm/%40builder.io/sdk-react-nextjs",
          "product": "@builder.io/sdk-react-nextjs",
          "vendor": "BuilderIO",
          "versions": [
            {
              "lessThanOrEqual": "0.25.13",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
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      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "George Chen"
        }
      ],
      "datePublic": "2026-08-25T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "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\u0027 renders."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 7.2,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "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",
            "version": "4.0",
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            "vulnIntegrityImpact": "HIGH"
          },
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            "baseScore": 7.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L",
            "version": "3.1"
          },
          "format": "CVSS"
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1321",
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              "type": "CWE"
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          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T20:32:37.544Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Issue #4823",
          "tags": [
            "issue-tracking"
          ],
          "url": "https://github.com/BuilderIO/builder/issues/4823"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/BuilderIO/builder"
        },
        {
          "name": "binding keys from content JSON are used as the write path",
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/BuilderIO/builder/blob/main/packages/sdks/src/functions/get-processed-block.ts#L84-L93"
        },
        {
          "name": "the deep-set helper has no __proto__ guard",
          "tags": [
            "technical-description"
          ],
          "url": "https://github.com/BuilderIO/builder/blob/main/packages/sdks/src/functions/set.ts#L7-L26"
        },
        {
          "name": "VulnCheck Advisory: Builder.io Gen2 SDKs through 5.2.11 Prototype Pollution via Bindings",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/builder-io-gen2-sdks-through-5.2.11-prototype-pollution-via-bindings"
        }
      ],
      "title": "Builder.io Gen2 SDKs through 5.2.11 Prototype Pollution via Bindings",
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        "engine": "vulncheck-endgame"
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  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-92779",
    "datePublished": "2026-09-16T20:32:37.544Z",
    "dateReserved": "2026-09-16T19:22:53.082Z",
    "dateUpdated": "2026-09-16T20:32:37.544Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.