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Vulnerability details: VCID-au5b-pexg-tubt
Vulnerability ID VCID-au5b-pexg-tubt
Aliases CVE-2026-30966
GHSA-5f92-jrq3-28rc
Summary Parse Server has role escalation and CLP bypass via direct `_Join` table write Parse Server's internal tables, which store Relation field mappings such as role memberships, can be directly accessed via the REST API or GraphQL API by any client using only the application key. No master key is required. An attacker can create, read, update, or delete records in any internal relationship table. Exploiting this allows the attacker to inject themselves into any Parse Role, gaining all permissions associated with that role, including full read, write, and delete access to classes protected by role-based Class-Level Permissions (CLP). Similarly, writing to any such table that backs a Relation field used in a `pointerFields` CLP bypasses that access control.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-284 Improper Access Control
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00064 https://api.first.org/data/v1/epss?cve=CVE-2026-30966
epss 0.00064 https://api.first.org/data/v1/epss?cve=CVE-2026-30966
epss 0.00064 https://api.first.org/data/v1/epss?cve=CVE-2026-30966
cvssv3.1_qr CRITICAL https://github.com/advisories/GHSA-5f92-jrq3-28rc
cvssv3.1 10.0 https://github.com/parse-community/parse-server
generic_textual CRITICAL https://github.com/parse-community/parse-server
cvssv3.1 10 https://github.com/parse-community/parse-server/releases/tag/8.6.20
cvssv3.1 10.0 https://github.com/parse-community/parse-server/releases/tag/8.6.20
generic_textual CRITICAL https://github.com/parse-community/parse-server/releases/tag/8.6.20
ssvc Track https://github.com/parse-community/parse-server/releases/tag/8.6.20
cvssv3.1 10 https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.7
cvssv3.1 10.0 https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.7
generic_textual CRITICAL https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.7
ssvc Track https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.7
cvssv3.1 10 https://github.com/parse-community/parse-server/security/advisories/GHSA-5f92-jrq3-28rc
cvssv3.1 10.0 https://github.com/parse-community/parse-server/security/advisories/GHSA-5f92-jrq3-28rc
cvssv3.1_qr CRITICAL https://github.com/parse-community/parse-server/security/advisories/GHSA-5f92-jrq3-28rc
generic_textual CRITICAL https://github.com/parse-community/parse-server/security/advisories/GHSA-5f92-jrq3-28rc
ssvc Track https://github.com/parse-community/parse-server/security/advisories/GHSA-5f92-jrq3-28rc
cvssv3.1 10.0 https://nvd.nist.gov/vuln/detail/CVE-2026-30966
generic_textual CRITICAL https://nvd.nist.gov/vuln/detail/CVE-2026-30966
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-30966
https://github.com/parse-community/parse-server
https://github.com/parse-community/parse-server/releases/tag/8.6.20
https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.7
CVE-2026-30966 https://nvd.nist.gov/vuln/detail/CVE-2026-30966
GHSA-5f92-jrq3-28rc https://github.com/advisories/GHSA-5f92-jrq3-28rc
GHSA-5f92-jrq3-28rc https://github.com/parse-community/parse-server/security/advisories/GHSA-5f92-jrq3-28rc
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L Found at https://github.com/parse-community/parse-server
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L Found at https://github.com/parse-community/parse-server/releases/tag/8.6.20
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L Found at https://github.com/parse-community/parse-server/releases/tag/8.6.20
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2026-03-11T14:31:08Z/ Found at https://github.com/parse-community/parse-server/releases/tag/8.6.20
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L Found at https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.7
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L Found at https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.7
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2026-03-11T14:31:08Z/ Found at https://github.com/parse-community/parse-server/releases/tag/9.5.2-alpha.7
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L Found at https://github.com/parse-community/parse-server/security/advisories/GHSA-5f92-jrq3-28rc
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L Found at https://github.com/parse-community/parse-server/security/advisories/GHSA-5f92-jrq3-28rc
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2026-03-11T14:31:08Z/ Found at https://github.com/parse-community/parse-server/security/advisories/GHSA-5f92-jrq3-28rc
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L Found at https://nvd.nist.gov/vuln/detail/CVE-2026-30966
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.20158
EPSS Score 0.00064
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-02T04:51:37.111318+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/parse-server/CVE-2026-30966.yml 38.6.0