CVE-2026-33421Network attack vector

Protected data disclosure via skipped pointer checks

Published Mar 24, 2026 · Updated Mar 24, 2026

Incorrect authorization in Parse Server before 8.6.53 and 9.0.0 through 9.6.0-alpha.41 allows remote authenticated users to read protected data. The LiveQuery WebSocket event path accepts a CLP result that defers pointer checks without verifying readUserFields or pointerFields against the subscriber. A valid account, enabled LiveQuery, and a pointer-protected class are required; matching REST queries remain restricted while unauthorized real-time updates are disclosed.

CVSS severity7.1
High
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Parse Server before 8.6.53 and 9.0.0 through 9.6.0-alpha.41 allows remote authenticated users to read protected data. The LiveQuery WebSocket event path accepts a CLP result that defers pointer checks without verifying readUserFields or pointerFields against the subscriber. A valid account, enabled LiveQuery, and a pointer-protected class are required; matching REST queries remain restricted while unauthorized real-time updates are disclosed.

The record

CVE
CVE-2026-33421
Published
Mar 24, 2026
Updated
Mar 24, 2026
Vendor
Parse Platform
Product
Parse Server
Classifications
CWE-863, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 24, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 8.6.53
  2. Affected versionversion=>= 9.0.0, < 9.6.0-alpha.42

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Parse Platform · Parse Serverversion=< 8.6.53; version=>= 9.0.0, < 9.6.0-alpha.42

Published CVSS scores

7.1GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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