CVE-2026-30939Network attack vector

Unauthenticated process crash via prototype-chain function lookup

Published Mar 10, 2026 · Updated Mar 10, 2026

Prototype-chain resolution in Parse Platform Parse Server before 8.6.13 and 9.0.0 through 9.5.1-alpha.1 allows remote attackers to crash the process. Cloud Function dispatch looks up untrusted function names in handler registries that resolve inherited Object prototype properties, and a recursive property exhausts the call stack. Exposure of the Cloud Function endpoint is the only reported gate; other inherited names and dot traversal return success for undefined functions without terminating the process.

CVSS severity8.8
High
EPSS probability0.49%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Prototype-chain resolution in Parse Platform Parse Server before 8.6.13 and 9.0.0 through 9.5.1-alpha.1 allows remote attackers to crash the process. Cloud Function dispatch looks up untrusted function names in handler registries that resolve inherited Object prototype properties, and a recursive property exhausts the call stack. Exposure of the Cloud Function endpoint is the only reported gate; other inherited names and dot traversal return success for undefined functions without terminating the process.

The record

CVE
CVE-2026-30939
Published
Mar 10, 2026
Updated
Mar 10, 2026
Vendor
Parse Platform
Product
Parse Server
Classifications
CWE-1321, T1499.004
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=< 8.6.13
  2. Affected versionversion=>= 9.0.0 < 9.5.1-alpha.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Parse Platform · Parse Serverversion=< 8.6.13; version=>= 9.0.0 < 9.5.1-alpha.2

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
8.8GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/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.

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-1321Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
T1499.004Application or System Exploitation Flood

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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