Vulnerability-Lookup

CVE-2026-34532 (GCVE-0-2026-34532)

Vulnerability from cvelistv5 – Published: 2026-03-31 14:42 – Updated: 2026-03-31 17:21

Title

Parse Server: Cloud function validator bypass via prototype chain traversal

Summary

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.67 and 9.7.0-alpha.11, an attacker can bypass Cloud Function validator access controls by appending "prototype.constructor" to the function name in the URL. When a Cloud Function handler is declared using the function keyword and its validator is a plain object or arrow function, the trigger store traversal resolves the handler through its own prototype chain while the validator store fails to mirror this traversal, causing all access control enforcement to be skipped. This allows unauthenticated callers to invoke Cloud Functions that are meant to be protected by validators such as requireUser, requireMaster, or custom validation logic. This issue has been patched in versions 8.6.67 and 9.7.0-alpha.11.

Severity

9.1 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator (v2.0.3)

CWE

CWE-863 - Incorrect Authorization

Assigner

GitHub_M

References

5 references

URL	Tags
https://github.com/parse-community/parse-server/s…	x_refsource_CONFIRM
https://github.com/parse-community/parse-server/p…	x_refsource_MISC
https://github.com/parse-community/parse-server/p…	x_refsource_MISC
https://github.com/parse-community/parse-server/c…	x_refsource_MISC
https://github.com/parse-community/parse-server/c…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
parse-community	parse-server	Affected: < 8.6.67 Affected: >= 9.0.0, < 9.7.0-alpha.11

Show details on NVD website

JSON

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}

bit-parse-2026-34532

Vulnerability from bitnami_vulndb

Published

2026-04-06 14:49

Modified

2026-04-06 15:13

Summary

Parse Server: Cloud function validator bypass via prototype chain traversal

Details

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.67 and 9.7.0, an attacker can bypass Cloud Function validator access controls by appending "prototype.constructor" to the function name in the URL. When a Cloud Function handler is declared using the function keyword and its validator is a plain object or arrow function, the trigger store traversal resolves the handler through its own prototype chain while the validator store fails to mirror this traversal, causing all access control enforcement to be skipped. This allows unauthenticated callers to invoke Cloud Functions that are meant to be protected by validators such as requireUser, requireMaster, or custom validation logic. This issue has been patched in versions 8.6.67 and 9.7.0.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "parse",
        "purl": "pkg:bitnami/parse"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.6.67"
            },
            {
              "introduced": "9.0.0"
            },
            {
              "fixed": "9.7.0"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/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"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-34532"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*"
    ],
    "severity": "Critical"
  },
  "details": "Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.67 and 9.7.0, an attacker can bypass Cloud Function validator access controls by appending \"prototype.constructor\" to the function name in the URL. When a Cloud Function handler is declared using the function keyword and its validator is a plain object or arrow function, the trigger store traversal resolves the handler through its own prototype chain while the validator store fails to mirror this traversal, causing all access control enforcement to be skipped. This allows unauthenticated callers to invoke Cloud Functions that are meant to be protected by validators such as requireUser, requireMaster, or custom validation logic. This issue has been patched in versions 8.6.67 and 9.7.0.",
  "id": "BIT-parse-2026-34532",
  "modified": "2026-04-06T15:13:09.641Z",
  "published": "2026-04-06T14:49:31.298Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/commit/4fc48cf28f22eea200d74d883505f485234a48d7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/commit/dc59e272665644083c5b7f6862d88ce1ef0b2674"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/pull/10342"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/pull/10343"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-vpj2-qq7w-5qq6"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34532"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Parse Server: Cloud function validator bypass via prototype chain traversal"
}

FKIE_CVE-2026-34532

Vulnerability from fkie_nvd - Published: 2026-03-31 15:16 - Updated: 2026-06-17 10:39

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/parse-community/parse-server/commit/4fc48cf28f22eea200d74d883505f485234a48d7	Patch
security-advisories@github.com	https://github.com/parse-community/parse-server/commit/dc59e272665644083c5b7f6862d88ce1ef0b2674	Patch
security-advisories@github.com	https://github.com/parse-community/parse-server/pull/10342	Issue Tracking, Patch
security-advisories@github.com	https://github.com/parse-community/parse-server/pull/10343	Issue Tracking, Patch
security-advisories@github.com	https://github.com/parse-community/parse-server/security/advisories/GHSA-vpj2-qq7w-5qq6	Mitigation, Patch, Vendor Advisory

Impacted products

Vendor	Product	Version
parseplatform	parse-server	*
parseplatform	parse-server	*
parseplatform	parse-server	9.7.0
parseplatform	parse-server	9.7.0
parseplatform	parse-server	9.7.0
parseplatform	parse-server	9.7.0
parseplatform	parse-server	9.7.0
parseplatform	parse-server	9.7.0
parseplatform	parse-server	9.7.0
parseplatform	parse-server	9.7.0
parseplatform	parse-server	9.7.0
parseplatform	parse-server	9.7.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "parse-server",
          "vendor": "parse-community",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 8.6.67"
            },
            {
              "status": "affected",
              "version": "\u003e= 9.0.0, \u003c 9.7.0-alpha.11"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "6BDF8B9B-281F-44DC-9EE0-ED551490D6D8",
              "versionEndExcluding": "8.6.67",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "E3DFF698-B3EE-4DCA-BAF3-9BE52F0F77D7",
              "versionEndExcluding": "9.7.0",
              "versionStartIncluding": "9.0.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha1:*:*:*:node.js:*:*",
              "matchCriteriaId": "3A140D3A-AECC-4CA1-958C-3CA53E313B27",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha10:*:*:*:node.js:*:*",
              "matchCriteriaId": "80D441B8-3B25-40E5-82E2-71E2A5E2F58F",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha2:*:*:*:node.js:*:*",
              "matchCriteriaId": "BEDAEFBC-DA77-4998-BDD6-A139E15E5CC3",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha3:*:*:*:node.js:*:*",
              "matchCriteriaId": "8C9E59AF-3B82-4D61-847B-A18E7DDF7A34",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha4:*:*:*:node.js:*:*",
              "matchCriteriaId": "2AB743CC-D168-4313-A5AA-43CF76D178E0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha5:*:*:*:node.js:*:*",
              "matchCriteriaId": "C351C736-AB91-4985-A0B4-43B120F5E5C5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha6:*:*:*:node.js:*:*",
              "matchCriteriaId": "F02797C9-E67D-4BF4-BB56-8D6DA9178322",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha7:*:*:*:node.js:*:*",
              "matchCriteriaId": "B059E381-D0F6-4425-92C0-167486379A98",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha8:*:*:*:node.js:*:*",
              "matchCriteriaId": "98C19734-3607-467D-9677-10A1909A8D8D",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:parseplatform:parse-server:9.7.0:alpha9:*:*:*:node.js:*:*",
              "matchCriteriaId": "F55001C0-EDDA-45D9-ABA4-CFF0489C9C01",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.67 and 9.7.0-alpha.11, an attacker can bypass Cloud Function validator access controls by appending \"prototype.constructor\" to the function name in the URL. When a Cloud Function handler is declared using the function keyword and its validator is a plain object or arrow function, the trigger store traversal resolves the handler through its own prototype chain while the validator store fails to mirror this traversal, causing all access control enforcement to be skipped. This allows unauthenticated callers to invoke Cloud Functions that are meant to be protected by validators such as requireUser, requireMaster, or custom validation logic. This issue has been patched in versions 8.6.67 and 9.7.0-alpha.11."
    }
  ],
  "id": "CVE-2026-34532",
  "lastModified": "2026-06-17T10:39:11.163",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34532",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-31T17:21:00.433792Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-31T15:16:20.010",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/parse-community/parse-server/commit/4fc48cf28f22eea200d74d883505f485234a48d7"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/parse-community/parse-server/commit/dc59e272665644083c5b7f6862d88ce1ef0b2674"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/parse-community/parse-server/pull/10342"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/parse-community/parse-server/pull/10343"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Mitigation",
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-vpj2-qq7w-5qq6"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-863"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-VPJ2-QQ7W-5QQ6

Vulnerability from github – Published: 2026-03-31 23:48 – Updated: 2026-03-31 23:48

Summary

parse-server has cloud function validator bypass via prototype chain traversal

Details

Impact

An attacker can bypass Cloud Function validator access controls by appending .prototype.constructor to the function name in the URL. When a Cloud Function handler is declared using the function keyword and its validator is a plain object or arrow function, the trigger store traversal resolves the handler through its own prototype chain while the validator store fails to mirror this traversal, causing all access control enforcement to be skipped.

This allows unauthenticated callers to invoke Cloud Functions that are meant to be protected by validators such as requireUser, requireMaster, or custom validation logic.

Patches

The trigger store traversal now verifies that each intermediate node is a legitimate store object before continuing traversal. If the traversal encounters a non-store value such as a function handler, it stops and returns an empty store, preventing prototype chain escape.

Workarounds

Use arrow functions instead of the function keyword for Cloud Function handlers. Arrow functions do not have a prototype property and are not affected by this vulnerability.

Resources

GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-vpj2-qq7w-5qq6
Fix Parse Server 9: https://github.com/parse-community/parse-server/pull/10342
Fix Parse Server 8: https://github.com/parse-community/parse-server/pull/10343

Severity

9.1 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "parse-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "9.0.0"
            },
            {
              "fixed": "9.7.0-alpha.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "parse-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.6.67"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-34532"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-31T23:48:38Z",
    "nvd_published_at": "2026-03-31T15:16:20Z",
    "severity": "CRITICAL"
  },
  "details": "### Impact\n\nAn attacker can bypass Cloud Function validator access controls by appending `.prototype.constructor` to the function name in the URL. When a Cloud Function handler is declared using the `function` keyword and its validator is a plain object or arrow function, the trigger store traversal resolves the handler through its own prototype chain while the validator store fails to mirror this traversal, causing all access control enforcement to be skipped.\n\nThis allows unauthenticated callers to invoke Cloud Functions that are meant to be protected by validators such as `requireUser`, `requireMaster`, or custom validation logic.\n\n### Patches\n\nThe trigger store traversal now verifies that each intermediate node is a legitimate store object before continuing traversal. If the traversal encounters a non-store value such as a function handler, it stops and returns an empty store, preventing prototype chain escape.\n\n### Workarounds\n\nUse arrow functions instead of the `function` keyword for Cloud Function handlers. Arrow functions do not have a `prototype` property and are not affected by this vulnerability.\n\n### Resources\n\n- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-vpj2-qq7w-5qq6\n- Fix Parse Server 9: https://github.com/parse-community/parse-server/pull/10342\n- Fix Parse Server 8: https://github.com/parse-community/parse-server/pull/10343",
  "id": "GHSA-vpj2-qq7w-5qq6",
  "modified": "2026-03-31T23:48:38Z",
  "published": "2026-03-31T23:48:38Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-vpj2-qq7w-5qq6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34532"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/pull/10342"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/pull/10343"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/commit/4fc48cf28f22eea200d74d883505f485234a48d7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/commit/dc59e272665644083c5b7f6862d88ce1ef0b2674"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/parse-community/parse-server"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "parse-server has cloud function validator bypass via prototype chain traversal"
}

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.

Action not permitted

CVE-2026-34532 (GCVE-0-2026-34532)

bit-parse-2026-34532

Vulnerability from bitnami_vulndb

FKIE_CVE-2026-34532

GHSA-VPJ2-QQ7W-5QQ6

Impact

Patches

Workarounds

Resources

Tags

Sightings

Nomenclature