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Vulnerability details: VCID-fdvb-gy4j-6qcn
Vulnerability ID VCID-fdvb-gy4j-6qcn
Aliases CVE-2026-30854
GHSA-q5q9-2rhp-33qw
Summary Parse Server: GraphQL `__type` introspection bypass via inline fragments when public introspection is disabled When `graphQLPublicIntrospection` is disabled, `__type` queries nested inside inline fragments (e.g. `... on Query { __type(name:"User") { name } })` bypass the introspection control, allowing unauthenticated users to perform type reconnaissance. `__schema` introspection is not affected.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-863 Incorrect Authorization
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 0.00019 https://api.first.org/data/v1/epss?cve=CVE-2026-30854
epss 0.00019 https://api.first.org/data/v1/epss?cve=CVE-2026-30854
epss 0.00019 https://api.first.org/data/v1/epss?cve=CVE-2026-30854
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-q5q9-2rhp-33qw
cvssv4 6.9 https://github.com/parse-community/parse-server
generic_textual MODERATE https://github.com/parse-community/parse-server
cvssv3.1_qr MODERATE https://github.com/parse-community/parse-server/security/advisories/GHSA-q5q9-2rhp-33qw
cvssv4 6.9 https://github.com/parse-community/parse-server/security/advisories/GHSA-q5q9-2rhp-33qw
generic_textual MODERATE https://github.com/parse-community/parse-server/security/advisories/GHSA-q5q9-2rhp-33qw
ssvc Track https://github.com/parse-community/parse-server/security/advisories/GHSA-q5q9-2rhp-33qw
cvssv4 6.9 https://nvd.nist.gov/vuln/detail/CVE-2026-30854
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2026-30854
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-30854
https://github.com/parse-community/parse-server
CVE-2026-30854 https://nvd.nist.gov/vuln/detail/CVE-2026-30854
GHSA-q5q9-2rhp-33qw https://github.com/advisories/GHSA-q5q9-2rhp-33qw
GHSA-q5q9-2rhp-33qw https://github.com/parse-community/parse-server/security/advisories/GHSA-q5q9-2rhp-33qw
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://github.com/parse-community/parse-server
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://github.com/parse-community/parse-server/security/advisories/GHSA-q5q9-2rhp-33qw
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-09T16:44:20Z/ Found at https://github.com/parse-community/parse-server/security/advisories/GHSA-q5q9-2rhp-33qw
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-30854
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

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low

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none
Exploit Prediction Scoring System (EPSS)
Percentile 0.05443
EPSS Score 0.00019
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-02T04:51:27.651466+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/parse-server/CVE-2026-30854.yml 38.6.0