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Not in CISA KEV

GHSA-q3p6-g7c4-829c is a CWE-346 vulnerability in parse-server. O3 Security confirms whether GHSA-q3p6-g7c4-829c is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

GraphQL API endpoint ignores CORS origin restriction

Also known asBIT-parse-2026-34373CVE-2026-34373
Published
Mar 30, 2026
Updated
Apr 6, 2026
Affected
2 pkgs
Patched
2 / 2
Exploits
None indexed
Exploitation data as of Apr 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Real-World Exposure

2 pkgs affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, a proxy for how much of the ecosystem is exposed.

parse-servernpm
36Kdownloads / week

Description

Impact

The GraphQL API endpoint does not respect the allowOrigin server option and unconditionally allows cross-origin requests from any website. This bypasses origin restrictions that operators configure to control which websites can interact with the Parse Server API. The REST API correctly enforces the configured allowOrigin restriction.

Patches

The GraphQL API endpoint now uses the same CORS middleware as the REST API, ensuring the allowOrigin and allowHeaders server options are consistently enforced across all endpoints.

Workarounds

There is no known workaround other than upgrading.

Resources

Affected Packages

2 total 2 fixed
EcosystemPackageVulnerable rangeFix
📦npmparse-server9.0.0&&< 9.7.0-alpha.109.7.0-alpha.10
📦npmparse-server3.5.0&&< 8.6.668.6.66

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. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update parse-server to 9.7.0-alpha.10 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q3p6-g7c4-829c is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-q3p6-g7c4-829c is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-q3p6-g7c4-829c. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

### Impact The GraphQL API endpoint does not respect the `allowOrigin` server option and unconditionally allows cross-origin requests from any website. This bypasses origin restrictions that operators configure to control which websites can interact with the Parse Server API. The REST API correctly enforces the configured `allowOrigin` restriction. ### Patches The GraphQL API endpoint now uses the same CORS middleware as the REST API, ensuring the `allowOrigin` and `allowHeaders` server options are consistently enforced across all endpoints. ### Workarounds There is no known workaround ot
O3 Security · Impact-Aware SCA

Is GHSA-q3p6-g7c4-829c in your dependencies?

O3 detects GHSA-q3p6-g7c4-829c across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

GHSA-q3p6-g7c4-829c: GraphQL API… | O3 Security