CVE-2026-33323

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.51 and 9.6.0-alpha.40, the Pages route and legacy PublicAPI route for resending email verification links return distinguishable responses depending on whether the provided username exists and has an unverified email. This allows an unauthenticated attacker to enumerate valid usernames by observing different redirect targets. The existing emailVerifySuccessOnInvalidEmail configuration option, which is enabled by default and protects the API route against this, did not apply to these routes. This issue has been patched in versions 8.6.51 and 9.6.0-alpha.40.

• CWE-204

• https://github.com/parse-community/parse-server/commit/967aa57732202009b2389ce9ecb3130d53d657e5Patch
• https://github.com/parse-community/parse-server/commit/fbda4cb0c5cbc8fad08a216823b6b64d4ae289c3Patch
• https://github.com/parse-community/parse-server/pull/10238Issue Tracking
• https://github.com/parse-community/parse-server/pull/10243Issue Tracking
• https://github.com/parse-community/parse-server/security/advisories/GHSA-h29g-q5c2-9h4fVendor Advisory

Published

Mar 24, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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