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CVE-2026-34573

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.68 and 9.7.0-alpha.12, the GraphQL query complexity validator can be exploited to cause a denial-of-service by sending a crafted query with binary fan-out fragment spreads. A single unauthenticated request can block the Node.js event loop for seconds, denying service to all concurrent users. This only affects deployments that have enabled the requestComplexity.graphQLDept
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e1d334a5b1321166bda0896c559743786b75dc048f93fd2f28a1e9e5e9666861
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"parse-server","vendor":"parse-community","versions":[{"status":"affected","version":"< 8.6.68"},{"status":"affected","version":">= 9.0.0, < 9.7.0-alpha.12"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:24f19199f9a22207841877cd51d54c7b64589ea002f93132aed8041234df7550 · sha256:e6afbe793d680c5f… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:24f19199f9a22207841877cd51d54c7b64589ea002f93132aed8041234df7550 · sha256:e6afbe793d680c5f… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

1 source assertion
{"cweId":"CWE-407","description":"CWE-407: Inefficient Algorithmic Complexity","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:24f19199f9a22207841877cd51d54c7b64589ea002f93132aed8041234df7550 · sha256:e6afbe793d680c5f… · /containers/cna/problemTypes/0/descriptions/0

Source references

5 source assertions
{"name":"https://github.com/parse-community/parse-server/commit/ea15412795f34594cc8a674fe858d445675e0295","tags":["x_refsource_MISC"],"url":"https://github.com/parse-community/parse-server/commit/ea15412795f34594cc8a674fe858d445675e0295"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:24f19199f9a22207841877cd51d54c7b64589ea002f93132aed8041234df7550 · sha256:e6afbe793d680c5f… · /containers/cna/references/3
{"name":"https://github.com/parse-community/parse-server/commit/f759bda075298ec44e2b4fb57659a0c56620483b","tags":["x_refsource_MISC"],"url":"https://github.com/parse-community/parse-server/commit/f759bda075298ec44e2b4fb57659a0c56620483b"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:24f19199f9a22207841877cd51d54c7b64589ea002f93132aed8041234df7550 · sha256:e6afbe793d680c5f… · /containers/cna/references/4
{"name":"https://github.com/parse-community/parse-server/pull/10344","tags":["x_refsource_MISC"],"url":"https://github.com/parse-community/parse-server/pull/10344"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:24f19199f9a22207841877cd51d54c7b64589ea002f93132aed8041234df7550 · sha256:e6afbe793d680c5f… · /containers/cna/references/1
{"name":"https://github.com/parse-community/parse-server/pull/10345","tags":["x_refsource_MISC"],"url":"https://github.com/parse-community/parse-server/pull/10345"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:24f19199f9a22207841877cd51d54c7b64589ea002f93132aed8041234df7550 · sha256:e6afbe793d680c5f… · /containers/cna/references/2
{"name":"https://github.com/parse-community/parse-server/security/advisories/GHSA-mfj6-6p54-m98c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-mfj6-6p54-m98c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:24f19199f9a22207841877cd51d54c7b64589ea002f93132aed8041234df7550 · sha256:e6afbe793d680c5f… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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