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CVE-2026-30854 — parse-server

CVE-2026-30854 is a CWE-863 vulnerability in parse-server. A fix is available for parse-server — see the affected versions and patch details below.

Parse Server: GraphQL `__type` introspection bypass via inline fragments when public introspection is disabled

Also known asBIT-parse-2026-30854GHSA-q5q9-2rhp-33qw
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
None indexed
Exploitation data as of Oct 26, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

No confirmed exploitation observed yet

  • CISA assesses this as automatable — exploitation doesn’t require manual, per-target effort, which raises the odds of mass scanning and opportunistic attacks.
  • CISA’s own triage has not observed active exploitation or public proof-of-concept code for this CVE as of its last assessment.

Exploitation and automatability from CISA’s SSVC triage for CVE-2026-30854.

EPSS Exploitation Probability

via FIRST.org ↗
0.3%probability of exploitation in next 30 days
Lower Risk-0.04%
Lower risk than most CVEs21th percentile — riskier than 21% of all scored CVEsHighest risk
0.00%0.28%0.56%0.83%0.0%0.3%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

62other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
parse-servernpm
51Kdownloads / week

Description

Impact

When graphQLPublicIntrospection is disabled, __type queries nested inside inline fragments (e.g. ... on Query { __type(name:"User") { name } }) bypass the introspection control, allowing unauthenticated users to perform type reconnaissance. __schema introspection is not affected.

Patches

The check was changed from a flat iteration over root-level selections to a recursive walk of all selection sets, detecting __type inside inline fragments at any depth.

Workarounds

Require master key authentication at the network layer (e.g. reverse proxy) for the GraphQL endpoint.

References

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmparse-server≥ 9.3.1-alpha.3&&< 9.5.0-alpha.109.5.0-alpha.10npm install parse-server@9.5.0-alpha.10

Affected Products

1 product · 12 configurations
Application
parse-serverparseplatform
≥ 9.4.0 && < 9.5.0
2 versions
9.3.19.5.0

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for parse-server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update parse-server to 9.5.0-alpha.10 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2026-30854 is resolved across your whole dependency graph.

  3. Workarounds

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

### Impact When `graphQLPublicIntrospection` is disabled, `__type` queries nested inside inline fragments (e.g. `... on Query { __type(name:"User") { name } })` bypass the introspection control, allowing unauthenticated users to perform type reconnaissance. `__schema` introspection is not affected. ### Patches The check was changed from a flat iteration over root-level selections to a recursive walk of all selection sets, detecting `__type` inside inline fragments at any depth. ### Workarounds Require master key authentication at the network layer (e.g. reverse proxy) for the GraphQL endp
O3 Security · Impact-Aware SCA

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CVE-2026-30854: parse-server — Fix Available