Vulnerability-Lookup

CVE-2026-34363 (GCVE-0-2026-34363)

Vulnerability from cvelistv5 – Published: 2026-03-31 14:35 – Updated: 2026-03-31 18:52

Title

Parse Server: LiveQuery protected field leak via shared mutable state across concurrent subscribers

Summary

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.65 and 9.7.0-alpha.9, when multiple clients subscribe to the same class via LiveQuery, the event handlers process each subscriber concurrently using shared mutable objects. The sensitive data filter modifies these shared objects in-place, so when one subscriber's filter removes a protected field, subsequent subscribers may receive the already-filtered object. This can cause protected fields and authentication data to leak to clients that should not see them, or cause clients that should see the data to receive an incomplete object. Additionally, when an afterEvent Cloud Code trigger is registered, one subscriber's trigger modifications can leak to other subscribers through the same shared mutable state. Any Parse Server deployment using LiveQuery with protected fields or afterEvent triggers is affected when multiple clients subscribe to the same class. This issue has been patched in versions 8.6.65 and 9.7.0-alpha.9.

Severity

8.2 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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: < 8.6.65 Affected: >= 9.0.0, < 9.7.0-alpha.9

Show details on NVD website

JSON

To clipboard

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}

bit-parse-2026-34363

Vulnerability from bitnami_vulndb

Published

2026-04-06 14:49

Modified

2026-04-06 15:13

Summary

Parse Server: LiveQuery protected field leak via shared mutable state across concurrent subscribers

Details

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.65 and 9.7.0, when multiple clients subscribe to the same class via LiveQuery, the event handlers process each subscriber concurrently using shared mutable objects. The sensitive data filter modifies these shared objects in-place, so when one subscriber's filter removes a protected field, subsequent subscribers may receive the already-filtered object. This can cause protected fields and authentication data to leak to clients that should not see them, or cause clients that should see the data to receive an incomplete object. Additionally, when an afterEvent Cloud Code trigger is registered, one subscriber's trigger modifications can leak to other subscribers through the same shared mutable state. Any Parse Server deployment using LiveQuery with protected fields or afterEvent triggers is affected when multiple clients subscribe to the same class. This issue has been patched in versions 8.6.65 and 9.7.0.

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "parse",
        "purl": "pkg:bitnami/parse"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.6.65"
            },
            {
              "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:N/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-2026-34363"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*"
    ],
    "severity": "High"
  },
  "details": "Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.65 and 9.7.0, when multiple clients subscribe to the same class via LiveQuery, the event handlers process each subscriber concurrently using shared mutable objects. The sensitive data filter modifies these shared objects in-place, so when one subscriber\u0027s filter removes a protected field, subsequent subscribers may receive the already-filtered object. This can cause protected fields and authentication data to leak to clients that should not see them, or cause clients that should see the data to receive an incomplete object. Additionally, when an afterEvent Cloud Code trigger is registered, one subscriber\u0027s trigger modifications can leak to other subscribers through the same shared mutable state. Any Parse Server deployment using LiveQuery with protected fields or afterEvent triggers is affected when multiple clients subscribe to the same class. This issue has been patched in versions 8.6.65 and 9.7.0.",
  "id": "BIT-parse-2026-34363",
  "modified": "2026-04-06T15:13:09.641Z",
  "published": "2026-04-06T14:49:27.983Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/commit/5834e29234593addaa0251a85f572ad4f376320b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/commit/776c71c3078e77d38c94937f463741793609d055"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/pull/10330"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/pull/10331"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-m983-v2ff-wq65"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34363"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Parse Server: LiveQuery protected field leak via shared mutable state across concurrent subscribers"
}

FKIE_CVE-2026-34363

Vulnerability from fkie_nvd - Published: 2026-03-31 15:16 - Updated: 2026-06-17 10:38

Severity

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

Summary

References

URL	Tags
security-advisories@github.com	https://github.com/parse-community/parse-server/commit/5834e29234593addaa0251a85f572ad4f376320b	Patch
security-advisories@github.com	https://github.com/parse-community/parse-server/commit/776c71c3078e77d38c94937f463741793609d055	Patch
security-advisories@github.com	https://github.com/parse-community/parse-server/pull/10330	Issue Tracking, Patch
security-advisories@github.com	https://github.com/parse-community/parse-server/pull/10331	Issue Tracking, Patch
security-advisories@github.com	https://github.com/parse-community/parse-server/security/advisories/GHSA-m983-v2ff-wq65	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

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "parse-server",
          "vendor": "parse-community",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 8.6.65"
            },
            {
              "status": "affected",
              "version": "\u003e= 9.0.0, \u003c 9.7.0-alpha.9"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "6E51E7A5-00A4-472A-BD77-5C257EF576C9",
              "versionEndExcluding": "8.6.65",
              "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: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
            }
          ],
          "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 8.6.65 and 9.7.0-alpha.9, when multiple clients subscribe to the same class via LiveQuery, the event handlers process each subscriber concurrently using shared mutable objects. The sensitive data filter modifies these shared objects in-place, so when one subscriber\u0027s filter removes a protected field, subsequent subscribers may receive the already-filtered object. This can cause protected fields and authentication data to leak to clients that should not see them, or cause clients that should see the data to receive an incomplete object. Additionally, when an afterEvent Cloud Code trigger is registered, one subscriber\u0027s trigger modifications can leak to other subscribers through the same shared mutable state. Any Parse Server deployment using LiveQuery with protected fields or afterEvent triggers is affected when multiple clients subscribe to the same class. This issue has been patched in versions 8.6.65 and 9.7.0-alpha.9."
    }
  ],
  "id": "CVE-2026-34363",
  "lastModified": "2026-06-17T10:38:56.990",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 3.6,
        "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": 8.2,
          "baseSeverity": "HIGH",
          "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:N/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": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-34363",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-03-31T18:50:22.038438Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-03-31T15:16:18.863",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/parse-community/parse-server/commit/5834e29234593addaa0251a85f572ad4f376320b"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/parse-community/parse-server/commit/776c71c3078e77d38c94937f463741793609d055"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/parse-community/parse-server/pull/10330"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/parse-community/parse-server/pull/10331"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-m983-v2ff-wq65"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}

GHSA-M983-V2FF-WQ65

Vulnerability from github – Published: 2026-03-30 17:40 – Updated: 2026-03-31 18:51

Summary

LiveQuery protected field leak via shared mutable state across concurrent subscribers

Details

Impact

When multiple clients subscribe to the same class via LiveQuery, the event handlers process each subscriber concurrently using shared mutable objects. The sensitive data filter modifies these shared objects in-place, so when one subscriber's filter removes a protected field, subsequent subscribers may receive the already-filtered object. This can cause protected fields and authentication data to leak to clients that should not see them, or cause clients that should see the data to receive an incomplete object.

Additionally, when an afterEvent Cloud Code trigger is registered, one subscriber's trigger modifications can leak to other subscribers through the same shared mutable state.

Any Parse Server deployment using LiveQuery with protected fields or afterEvent triggers is affected when multiple clients subscribe to the same class.

Patches

The fix deep-clones the shared objects at the start of each subscriber's processing callback, ensuring each subscriber works on an independent copy. Additionally, a bug was fixed where master key LiveQuery clients could not receive events on classes with protected fields due to an incorrect type passed to the sensitive data filter.

Workarounds

There is no known workaround.

Resources

GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-m983-v2ff-wq65
Fix Parse Server 9: https://github.com/parse-community/parse-server/pull/10330
Fix Parse Server 8: https://github.com/parse-community/parse-server/pull/10331

Severity

8.2 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/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.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "npm",
        "name": "parse-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.6.65"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-34363"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-30T17:40:59Z",
    "nvd_published_at": "2026-03-31T15:16:18Z",
    "severity": "HIGH"
  },
  "details": "### Impact\n\nWhen multiple clients subscribe to the same class via LiveQuery, the event handlers process each subscriber concurrently using shared mutable objects. The sensitive data filter modifies these shared objects in-place, so when one subscriber\u0027s filter removes a protected field, subsequent subscribers may receive the already-filtered object. This can cause protected fields and authentication data to leak to clients that should not see them, or cause clients that should see the data to receive an incomplete object.\n\nAdditionally, when an afterEvent Cloud Code trigger is registered, one subscriber\u0027s trigger modifications can leak to other subscribers through the same shared mutable state.\n\nAny Parse Server deployment using LiveQuery with protected fields or afterEvent triggers is affected when multiple clients subscribe to the same class.\n\n### Patches\n\nThe fix deep-clones the shared objects at the start of each subscriber\u0027s processing callback, ensuring each subscriber works on an independent copy. Additionally, a bug was fixed where master key LiveQuery clients could not receive events on classes with protected fields due to an incorrect type passed to the sensitive data filter.\n\n### Workarounds\n\nThere is no known workaround.\n\n### Resources\n\n- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-m983-v2ff-wq65\n- Fix Parse Server 9: https://github.com/parse-community/parse-server/pull/10330\n- Fix Parse Server 8: https://github.com/parse-community/parse-server/pull/10331",
  "id": "GHSA-m983-v2ff-wq65",
  "modified": "2026-03-31T18:51:49Z",
  "published": "2026-03-30T17:40:59Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-m983-v2ff-wq65"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34363"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/pull/10330"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/pull/10331"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/commit/5834e29234593addaa0251a85f572ad4f376320b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/commit/776c71c3078e77d38c94937f463741793609d055"
    },
    {
      "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:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "LiveQuery protected field leak via shared mutable state across concurrent subscribers"
}

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-2026-34363 (GCVE-0-2026-34363)

bit-parse-2026-34363

Vulnerability from bitnami_vulndb

FKIE_CVE-2026-34363

GHSA-M983-V2FF-WQ65

Impact

Patches

Workarounds

Resources

Tags

Sightings

Nomenclature