High severity · published Mar 6, 2026
CVE-2026-29182
Parse Server: Cloud Hooks and Cloud Jobs bypass `readOnlyMasterKey` write restriction
7.2
CVSS
0.4%
EPSS
No
On KEV
Description
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.4 and 9.4.1-alpha.3, Parse Server's readOnlyMasterKey option allows access with master-level read privileges but is documented to deny all write operations. However, some endpoints incorrectly accept the readOnlyMasterKey for mutating operations. This allows a caller who only holds the readOnlyMasterKey to create, modify, and delete Cloud Hooks and to start Cloud Jobs, which can be used for data exfiltration. Any Parse Server deployment that uses the readOnlyMasterKey option is affected. Note than an attacker needs to know the readOnlyMasterKey to exploit this vulnerability. This issue has been patched in versions 8.6.4 and 9.4.1-alpha.3.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
PA
parse-server · parse-community
< 8.6.4; < 9.4.1-alpha.3 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-29182
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-29182
Patch
https://github.com/parse-community/parse-server/releases/tag/8.6.4
Patch
https://github.com/parse-community/parse-server/releases/tag/9.4.1-alpha.3
Vendor Advisory
https://github.com/parse-community/parse-server/security/advisories/GHSA-vc89-5g3r-cmhh
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