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.
{
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30938.json",
"unresolved_ranges": [
{
"extracted_events": [
{
"introduced": ">= 9.0.0 < 9.5.1-alpha.1"
},
{
"last_affected": ">= 9.0.0 < 9.5.1-alpha.1"
}
],
"source": "AFFECTED_FIELD"
}
],
"cwe_ids": [
"CWE-693"
]
}{
"cpe": "cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "8.6.12"
},
{
"introduced": "9.0.0"
},
{
"fixed": "9.5.1"
}
],
"source": [
"CPE_RANGE",
"REFERENCES"
]
}