Vulnerability-Lookup

CVE-2026-66009 (GCVE-0-2026-66009)

Vulnerability from cvelistv5 – Published: 2026-07-24 12:07 – Updated: 2026-07-25 00:52

Title

Parse Server 9.0.0 Information Disclosure via GraphQL Error Messages

Summary

Parse Server versions >= 9.0.0 before 9.10.0-alpha.5 and >= 8.2.2 before 8.6.86 return GraphQL validation error messages that name required custom input fields even when public introspection is disabled (graphQLPublicIntrospection: false, the default). A client holding only the public application id — with no user session, master key, or maintenance key — can trigger validation errors to learn the names of required (non-null) custom fields on classes it already references by name, partially defeating the schema-hiding intent of disabling public introspection. No stored data, credentials, optional field names, unreferenced class names, or Cloud Code function names are exposed.

Severity

6.3 (Medium)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-209 - Generation of Error Message Containing Sensitive Information

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/parse-community/parse-server/s…	vendor-advisory
https://www.vulncheck.com/advisories/parse-server…	third-party-advisory

Impacted products

2 products

Vendor	Product	Version
parse-community	parse-server	Affected: 9.0.0 , < 9.10.0-alpha.5 (semver) Unaffected: 9.10.0-alpha.5 (semver)
parse-community	parse-server	Affected: 8.2.2 , < 8.6.86 (semver) Unaffected: 8.6.86 (semver)

Date Public

2026-07-10 00:00

Credits

mtrezza

Show details on NVD website

JSON

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{
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        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-66009",
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GHSA-V9G2-R7JF-7J84

Vulnerability from github – Published: 2026-07-24 15:33 – Updated: 2026-07-24 15:33

Details

Severity

6.3 (Medium)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-66009"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-209"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-24T13:18:28Z",
    "severity": "MODERATE"
  },
  "details": "Parse Server versions \u003e= 9.0.0 before 9.10.0-alpha.5 and \u003e= 8.2.2 before 8.6.86 return GraphQL validation error messages that name required custom input fields even when public introspection is disabled (graphQLPublicIntrospection: false, the default). A client holding only the public application id \u2014 with no user session, master key, or maintenance key \u2014 can trigger validation errors to learn the names of required (non-null) custom fields on classes it already references by name, partially defeating the schema-hiding intent of disabling public introspection. No stored data, credentials, optional field names, unreferenced class names, or Cloud Code function names are exposed.",
  "id": "GHSA-v9g2-r7jf-7j84",
  "modified": "2026-07-24T15:33:01Z",
  "published": "2026-07-24T15:33:01Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-2fgh-8j2g-w354"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66009"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/parse-server-information-disclosure-via-graphql-error-messages-2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/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"
    }
  ]
}

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-2026-66009 (GCVE-0-2026-66009)

GHSA-V9G2-R7JF-7J84

Tags

Sightings

Nomenclature