CVE-2026-30938Network attack vector

Denylist bypass via premature sibling-scan termination

Published Mar 10, 2026 · Updated Mar 10, 2026

Protection mechanism failure in Parse Server allows remote attackers to bypass request keyword filtering via crafted request payloads. The requestKeywordDenylist scanner returns from its sibling-key loop after the first nested object or array, leaving later prohibited keys unchecked. The control is enabled by default, and affected releases are before 8.6.12 and 9.0.0-alpha.1 through versions before 9.5.1-alpha.1; accepted requests can submit developer-prohibited keywords for application processing.

CVSS severity6.9
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Protection mechanism failure in Parse Server allows remote attackers to bypass request keyword filtering via crafted request payloads. The requestKeywordDenylist scanner returns from its sibling-key loop after the first nested object or array, leaving later prohibited keys unchecked. The control is enabled by default, and affected releases are before 8.6.12 and 9.0.0-alpha.1 through versions before 9.5.1-alpha.1; accepted requests can submit developer-prohibited keywords for application processing.

The record

CVE
CVE-2026-30938
Published
Mar 10, 2026
Updated
Mar 10, 2026
Vendor
Parse Platform
Product
Parse Server
Classifications
CWE-693
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 10, 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=< 8.6.12
  2. Affected versionversion=>= 9.0.0 < 9.5.1-alpha.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Parse Platform · Parse Serverversion=< 8.6.12; version=>= 9.0.0 < 9.5.1-alpha.1

Published CVSS scores

6.9GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA: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.

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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-693Protection Mechanism Failure

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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