CVE-2026-30938

MEDIUM EPSS 31.2%
Published Mar 10, 20263mo ago · Modified Jun 17, 20262w ago
6.9 CVSS 4.0
Medium
Find Similar
Published Mar 10, 2026 3mo ago
Last Modified Jun 17, 2026 2w ago

Description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 8.6.12 and 9.5.1-alpha.1, the requestKeywordDenylist security control can be bypassed by placing any nested object or array before a prohibited keyword in the request payload. This is caused by a logic bug that stops scanning sibling keys after encountering the first nested value. Any custom requestKeywordDenylist entries configured by the developer are equally by-passable using the same technique. All Parse Server deployments are affected. The requestKeywordDenylist is enabled by default. This vulnerability is fixed in 8.6.12 and 9.5.1-alpha.1. Use a Cloud Code beforeSave trigger to validate incoming data for prohibited keywords across all classes.

CVSS Details

Base Score
6.9
Exploitability
—
Impact
—
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X

Threat Intelligence

EPSS Exploit Probability
31.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-693

Affected Products 2

VendorProductVersionRange
parseplatformparse-server* <8.6.12
parseplatformparse-server*≥9.0.0  –  <9.5.1

References 3

  • github.com https://github.com/parse-community/parse-server/releases/tag/8.6.12
    ProductRelease Notes
  • github.com https://github.com/parse-community/parse-server/releases/tag/9.5.1-alpha.1
    ProductRelease Notes
  • github.com https://github.com/parse-community/parse-server/security/advisories/GHSA-q342-9w2p-57fp
    MitigationPatchVendor Advisory

Remediation

  • github.com https://github.com/parse-community/parse-server/security/advisories/GHSA-q342-9w2p-57fp
    MitigationPatchVendor Advisory