CVE-2026-34363Network attack vector

Protected data disclosure via shared LiveQuery objects

Published Mar 31, 2026 · Updated Mar 31, 2026

Race condition in Parse Server before 8.6.65 and 9.0.0 through 9.7.0-alpha.8 allows remote attackers to read protected data. ParseLiveQueryServer processes subscriber callbacks concurrently against the same mutable event object, and its sensitive-data filter removes fields in place before later callbacks run. Exploitation requires multiple clients subscribed to the same class and a deployment using protected fields or afterEvent triggers; disclosure is limited to data in the shared event object.

CVSS severity8.2
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Parse Server before 8.6.65 and 9.0.0 through 9.7.0-alpha.8 allows remote attackers to read protected data. ParseLiveQueryServer processes subscriber callbacks concurrently against the same mutable event object, and its sensitive-data filter removes fields in place before later callbacks run. Exploitation requires multiple clients subscribed to the same class and a deployment using protected fields or afterEvent triggers; disclosure is limited to data in the shared event object.

The record

CVE
CVE-2026-34363
Published
Mar 31, 2026
Updated
Mar 31, 2026
Vendor
Parse Platform
Product
Parse Server
Classifications
CWE-362, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 31, 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=< 8.6.65
  2. Affected versionversion=>= 9.0.0, < 9.7.0-alpha.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Parse Platform · Parse Serverversion=< 8.6.65; version=>= 9.0.0, < 9.7.0-alpha.9

Published CVSS scores

8.2GitHub, Inc.CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
5.3NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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