CVE-2026-33538 (GCVE-0-2026-33538)

Vulnerability from cvelistv5 – Published: 2026-03-24 18:24 – Updated: 2026-03-24 18:37
VLAI?
Title
Parse Server: Denial of service via unindexed database query for unconfigured auth providers
Summary
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.58 and 9.6.0-alpha.52, an unauthenticated attacker can cause denial of service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request, and since no database index exists for unconfigured providers, each request triggers a full collection scan on the user database. This can be parallelized to saturate database resources. This issue has been patched in versions 8.6.58 and 9.6.0-alpha.52.
Severity ?
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CWE
  • CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
Vendor Product Version
parse-community parse-server Affected: < 8.6.58
Affected: >= 9.0.0, < 9.6.0-alpha.52
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      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-33538\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-03-24T18:37:14.649898Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-03-24T18:37:18.352Z\"}}], \"cna\": {\"title\": \"Parse Server: Denial of service via unindexed database query for unconfigured auth providers\", \"source\": {\"advisory\": \"GHSA-g4cf-xj29-wqqr\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 8.7, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\"}}], \"affected\": [{\"vendor\": \"parse-community\", \"product\": \"parse-server\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 8.6.58\"}, {\"status\": \"affected\", \"version\": \"\u003e= 9.0.0, \u003c 9.6.0-alpha.52\"}]}], \"references\": [{\"url\": \"https://github.com/parse-community/parse-server/security/advisories/GHSA-g4cf-xj29-wqqr\", \"name\": \"https://github.com/parse-community/parse-server/security/advisories/GHSA-g4cf-xj29-wqqr\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/parse-community/parse-server/pull/10270\", \"name\": \"https://github.com/parse-community/parse-server/pull/10270\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/parse-community/parse-server/pull/10271\", \"name\": \"https://github.com/parse-community/parse-server/pull/10271\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/parse-community/parse-server/commit/40eb442e02672986730007d0a1edb22c1c4bd357\", \"name\": \"https://github.com/parse-community/parse-server/commit/40eb442e02672986730007d0a1edb22c1c4bd357\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://github.com/parse-community/parse-server/commit/fbac847499e57f243315c5fc7135be1d58bb8e54\", \"name\": \"https://github.com/parse-community/parse-server/commit/fbac847499e57f243315c5fc7135be1d58bb8e54\", \"tags\": [\"x_refsource_MISC\"]}], \"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 8.6.58 and 9.6.0-alpha.52, an unauthenticated attacker can cause denial of service by sending authentication requests with arbitrary, unconfigured provider names. The server executes a database query for each unconfigured provider before rejecting the request, and since no database index exists for unconfigured providers, each request triggers a full collection scan on the user database. This can be parallelized to saturate database resources. This issue has been patched in versions 8.6.58 and 9.6.0-alpha.52.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-400\", \"description\": \"CWE-400: Uncontrolled Resource Consumption\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-03-24T18:24:51.595Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-33538\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-03-24T18:37:24.020Z\", \"dateReserved\": \"2026-03-20T18:05:11.831Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-03-24T18:24:51.595Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

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.