Parse Server: File creation and deletion bypasses `readOnlyMasterKey` write restriction
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.5 and 9.5.0-alpha.3, the readOnlyMasterKey can be used to create and delete files via the Files API (POST /files/:filename, DELETE /files/:filename). This bypasses the read-only restriction which violates the access scope of the readOnlyMasterKey. Any Parse Server deployment that uses readOnlyMasterKey and exposes the Files API is affected. An attacker with access to the readOnlyMasterKey can upload arbitrary files or delete existing files. This issue has been patched in versions 8.6.5 and 9.5.0-alpha.3.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-30228
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 17:10 UTC · Revision 1
Source evidence
Parse Server: File creation and deletion bypasses `readOnlyMasterKey` write restriction
core-osv · Original sourcePublished 6 Mar 2026, 20:25 UTC
Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.5 and 9.5.0-alpha.3, the readOnlyMasterKey can be used to create and delete files via the Files API (POST /files/:filename, DELETE /files/:filename). This bypasses the read-only restriction which violates the access scope of the readOnlyMasterKey. Any Parse Server deployment that uses readOnlyMasterKey and exposes the Files API is affected. An attacker with access to the readOnlyMasterKey can upload arbitrary files or delete existing files. This issue has been patched in versions 8.6.5 and 9.5.0-alpha.3.
osv:CVE-2026-30228
Complete source record
{
"id": "dd2024f15df519f790a2ecfafc1016efedcf91564d10f4d0883934c1d89c1aba",
"url": "https://osv.dev/vulnerability/CVE-2026-30228",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Parse Server: File creation and deletion bypasses `readOnlyMasterKey` write restriction",
"summary": "Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.5 and 9.5.0-alpha.3, the readOnlyMasterKey can be used to create and delete files via the Files API (POST /files/:filename, DELETE /files/:filename). This bypasses the read-only restriction which violates the access scope of the readOnlyMasterKey. Any Parse Server deployment that uses readOnlyMasterKey and exposes the Files API is affected. An attacker with access to the readOnlyMasterKey can upload arbitrary files or delete existing files. This issue has been patched in versions 8.6.5 and 9.5.0-alpha.3.",
"evidence": "osv:CVE-2026-30228",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-30228",
"aliases": [
"BIT-parse-2026-30228",
"CVE-2026-30228",
"GHSA-xfh7-phr7-gr2x"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"
}
],
"affected": [
{
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"repo": "https://github.com/parse-community/parse-server",
"type": "GIT",
"events": [
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{
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{
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{
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}
],
"database_specific": {
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"source": "CPE_RANGE"
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{
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"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-30228.json"
}
}
],
"modified": "2026-10-28T02:30:21.380637291Z",
"provider": "osv",
"references": [
"https://github.com/parse-community/parse-server/releases/tag/8.6.5",
"https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.3",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30228.json",
"https://github.com/parse-community/parse-server/security/advisories/GHSA-xfh7-phr7-gr2x",
"https://nvd.nist.gov/vuln/detail/CVE-2026-30228"
],
"provider_metadata": {
"cwe_ids": [
"CWE-863"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30228.json"
}
},
"related_cves": [
{
"value": "CVE-2026-30228",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 487564,
"published_at": "2026-03-06T20:25:35.327+00:00"
}