CVE-2026-32770Network attack vector

Unauthenticated server crash via malformed LiveQuery regex

Published Mar 18, 2026 · Updated Mar 18, 2026

Improper input validation in Parse Server before 8.6.43 and 9.0.0 through 9.6.0-alpha.18 allows remote attackers to crash the server. ParseLiveQueryServer accepts a subscription's malformed $regex constraint without compiling it, and QueryTools lets the resulting regex exception escape during subscription matching. LiveQuery must be enabled and reachable; no authentication or user interaction is required, and the uncaught exception terminates the process for all connected clients.

CVSS severity5.9
Medium
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Parse Server before 8.6.43 and 9.0.0 through 9.6.0-alpha.18 allows remote attackers to crash the server. ParseLiveQueryServer accepts a subscription's malformed $regex constraint without compiling it, and QueryTools lets the resulting regex exception escape during subscription matching. LiveQuery must be enabled and reachable; no authentication or user interaction is required, and the uncaught exception terminates the process for all connected clients.

The record

CVE
CVE-2026-32770
Published
Mar 18, 2026
Updated
Mar 18, 2026
Vendor
Parse Platform
Product
Parse Server
Classifications
CWE-20, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 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=< 8.6.43
  2. Affected versionversion=>= 9.0.0, < 9.6.0-alpha.19

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Parse Platform · Parse Serverversion=< 8.6.43; version=>= 9.0.0, < 9.6.0-alpha.19

Published CVSS scores

5.9GitHubCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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-20Improper Input Validation
T1499.004Application or System Exploitation

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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