Parse Server's GraphQL WebSocket endpoint bypasses security middleware

CVE-2026-32594 → View on GitHub ↗ View on CVE.org ↗ View on NVD ↗

Description

Impact

Any Parse Server deployment that uses the GraphQL API is affected. The GraphQL WebSocket endpoint for subscriptions does not pass requests through the Express middleware chain that enforces authentication, introspection control, and query complexity limits. An attacker can connect to the WebSocket endpoint and execute GraphQL operations without providing a valid application or API key, access the GraphQL schema via introspection even when public introspection is disabled, and send arbitrarily complex queries that bypass configured complexity limits.

Patches

The unfinished GraphQL WebSocket subscription feature has been removed, including the createSubscriptions method and the subscriptions-transport-ws dependency. GraphQL subscriptions were never functional in Parse Server as the schema did not define any subscription types.

Workarounds

Block WebSocket upgrade requests to the GraphQL subscriptions path (by default /subscriptions) at the network level, for example using a reverse proxy or load balancer rule.

Basic information

Type
reviewed
Severity
medium
Advisory on GitHub
Open advisory ↗
Repository advisory
Open repository advisory ↗
Source code
Browse source ↗
Published (advisory)
2026-03-13 20:04:44 UTC
Updated
2026-03-16 22:01:26 UTC
GitHub reviewed
2026-03-13 20:04:44 UTC
NVD published
2026-03-16

EPSS Score

Score Percentile
0.11% 29.34%

CVSS Scores

Base score Version Severity Vector
6.9 4.0 —
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network.
Attack complexity (AC:L)
Exploitation conditions are straightforward and stable.
Attack requirements (AT:N)
No additional preconditions are required beyond normal reachability.
Privileges required (PR:N)
No privileges are required.
User interaction (UI:N)
No user interaction is required.
Vulnerable system confidentiality impact (VC:L)
Limited confidentiality impact on the vulnerable system.
Vulnerable system integrity impact (VI:N)
No integrity impact on the vulnerable system.
Vulnerable system availability impact (VA:L)
Limited availability impact on the vulnerable system.
Subsequent system confidentiality impact (SC:N)
No confidentiality impact on subsequent systems.
Subsequent system integrity impact (SI:N)
No integrity impact on subsequent systems.
Subsequent system availability impact (SA:N)
No availability impact on subsequent systems.

Identifiers

Type Value
GHSA GHSA-p2x3-8689-cwpg ↗
CVE CVE-2026-32594 ↗

CWEs

CWE id Name
CWE-306 Missing Authentication for Critical Function

Credits

  • fancymalware (reporter)
  • mtrezza (coordinator)

Affected packages (2)

Vulnerable version ranges and first patched releases as published by GitHub.

Ecosystem Package Vulnerable range First patched Vulnerable functions
npm parse-server >= 9.0.0, < 9.6.0-alpha.14 9.6.0-alpha.14 —
npm parse-server < 8.0.0 8.6.40 —

References

cvelogic Threat Intelligence