High 8.7Published Mar 24, 2026

CVE-2026-33538Parse Server: Denial of service via unindexed database query for unconfigured auth providers

Updated under an hour ago (Oct 27, 2026, 11:40 PM ET)

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It affects parse-community parse-server and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for parse-community parse-server

Exploited in the last 30 days

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.

CVSS: 8.7 HIGH (v4.0, CNA)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
Weakness (CWE): CWE-400
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Mar 24, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

parse-community parse-server parse_community:parse_server (from the name)	before 8.6.58; from 9.0.0, < 9.6.0-alpha.52	CNA record
parseplatform parse-server parseplatform:parse-server	before 8.6.58; from 9.0.0 before 9.6.0; 9.6.0; 9.6.0; 9.6.0; 9.6.0; 9.6.0; 9.6.0; and 45 more ranges	NVD

References

References

https://github.com/parse-community/parse-server/security/advisories/GHSA-g4cf-xj29-wqqr	x-refsource-confirm, vendor-advisory
https://github.com/parse-community/parse-server/pull/10270	x-refsource-misc, issue-tracking
https://github.com/parse-community/parse-server/pull/10271	x-refsource-misc, issue-tracking
https://github.com/parse-community/parse-server/commit/40eb442e02672986730007d0a1edb22c1c4bd357	x-refsource-misc, patch
https://github.com/parse-community/parse-server/commit/fbac847499e57f243315c5fc7135be1d58bb8e54	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.