GHSA-MMG8-87C5-JRC2
Vulnerability from github – Published: 2026-04-01 00:07 – Updated: 2026-04-01 00:07
VLAI?
Summary
Parse Server has a LiveQuery protected-field guard bypass via array-like logical operator value
Details
Impact
An authenticated user with find class-level permission can bypass the protectedFields class-level permission setting on LiveQuery subscriptions. By sending a subscription with a $or, $and, or $nor operator value as a plain object with numeric keys and a length property (an "array-like" object) instead of an array, the protected-field guard is bypassed. The subscription event firing acts as a binary oracle, allowing the attacker to infer whether a protected field matches a given test value.
Patches
The fix validates that $or, $and, and $nor operator values are arrays in the LiveQuery subscription handler, the query depth checker, and the protected-field guard. As defense in depth, the LiveQuery query evaluator also rejects non-array values for these operators.
Workarounds
There is no known workaround.
Severity ?
{
"affected": [
{
"package": {
"ecosystem": "npm",
"name": "parse-server"
},
"ranges": [
{
"events": [
{
"introduced": "9.0.0"
},
{
"fixed": "9.7.0-alpha.16"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "npm",
"name": "parse-server"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "8.6.70"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-34595"
],
"database_specific": {
"cwe_ids": [
"CWE-843"
],
"github_reviewed": true,
"github_reviewed_at": "2026-04-01T00:07:39Z",
"nvd_published_at": "2026-03-31T16:16:34Z",
"severity": "MODERATE"
},
"details": "### Impact\n\nAn authenticated user with `find` class-level permission can bypass the `protectedFields` class-level permission setting on LiveQuery subscriptions. By sending a subscription with a `$or`, `$and`, or `$nor` operator value as a plain object with numeric keys and a `length` property (an \"array-like\" object) instead of an array, the protected-field guard is bypassed. The subscription event firing acts as a binary oracle, allowing the attacker to infer whether a protected field matches a given test value.\n\n### Patches\n\nThe fix validates that `$or`, `$and`, and `$nor` operator values are arrays in the LiveQuery subscription handler, the query depth checker, and the protected-field guard. As defense in depth, the LiveQuery query evaluator also rejects non-array values for these operators.\n\n### Workarounds\n\nThere is no known workaround.",
"id": "GHSA-mmg8-87c5-jrc2",
"modified": "2026-04-01T00:07:39Z",
"published": "2026-04-01T00:07:39Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/parse-community/parse-server/security/advisories/GHSA-mmg8-87c5-jrc2"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-34595"
},
{
"type": "WEB",
"url": "https://github.com/parse-community/parse-server/pull/10350"
},
{
"type": "WEB",
"url": "https://github.com/parse-community/parse-server/pull/10351"
},
{
"type": "WEB",
"url": "https://github.com/parse-community/parse-server/commit/f63fd1a3fe0a7c1c5fe809f01b0e04759e8c9b98"
},
{
"type": "WEB",
"url": "https://github.com/parse-community/parse-server/commit/ffad0ec6b971ee0dd9545e1bf1fb34ddebf275c2"
},
{
"type": "PACKAGE",
"url": "https://github.com/parse-community/parse-server"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
}
],
"summary": "Parse Server has a LiveQuery protected-field guard bypass via array-like logical operator value"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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