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Vulnerability details: VCID-9fqm-a5xk-j7d5
Vulnerability ID VCID-9fqm-a5xk-j7d5
Aliases CVE-2026-30938
GHSA-q342-9w2p-57fp
Summary Parse Server has denylist `requestKeywordDenylist` keyword scan bypass through nested object placement 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.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-693 Protection Mechanism Failure
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 0.00067 https://api.first.org/data/v1/epss?cve=CVE-2026-30938
epss 0.00067 https://api.first.org/data/v1/epss?cve=CVE-2026-30938
epss 0.00067 https://api.first.org/data/v1/epss?cve=CVE-2026-30938
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-q342-9w2p-57fp
cvssv4 6.9 https://github.com/parse-community/parse-server
generic_textual MODERATE https://github.com/parse-community/parse-server
cvssv4 6.9 https://github.com/parse-community/parse-server/releases/tag/8.6.12
generic_textual MODERATE https://github.com/parse-community/parse-server/releases/tag/8.6.12
ssvc Track https://github.com/parse-community/parse-server/releases/tag/8.6.12
cvssv4 6.9 https://github.com/parse-community/parse-server/releases/tag/9.5.1-alpha.1
generic_textual MODERATE https://github.com/parse-community/parse-server/releases/tag/9.5.1-alpha.1
ssvc Track https://github.com/parse-community/parse-server/releases/tag/9.5.1-alpha.1
cvssv3.1_qr MODERATE https://github.com/parse-community/parse-server/security/advisories/GHSA-q342-9w2p-57fp
cvssv4 6.9 https://github.com/parse-community/parse-server/security/advisories/GHSA-q342-9w2p-57fp
generic_textual MODERATE https://github.com/parse-community/parse-server/security/advisories/GHSA-q342-9w2p-57fp
ssvc Track https://github.com/parse-community/parse-server/security/advisories/GHSA-q342-9w2p-57fp
cvssv4 6.9 https://nvd.nist.gov/vuln/detail/CVE-2026-30938
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2026-30938
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-30938
https://github.com/parse-community/parse-server
https://github.com/parse-community/parse-server/releases/tag/8.6.12
https://github.com/parse-community/parse-server/releases/tag/9.5.1-alpha.1
CVE-2026-30938 https://nvd.nist.gov/vuln/detail/CVE-2026-30938
GHSA-q342-9w2p-57fp https://github.com/advisories/GHSA-q342-9w2p-57fp
GHSA-q342-9w2p-57fp https://github.com/parse-community/parse-server/security/advisories/GHSA-q342-9w2p-57fp
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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)

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Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/parse-community/parse-server/releases/tag/8.6.12
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)

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adjacent

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-10T16:56:19Z/ Found at https://github.com/parse-community/parse-server/releases/tag/8.6.12
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/parse-community/parse-server/releases/tag/9.5.1-alpha.1
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

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-10T16:56:19Z/ Found at https://github.com/parse-community/parse-server/releases/tag/9.5.1-alpha.1
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://github.com/parse-community/parse-server/security/advisories/GHSA-q342-9w2p-57fp
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

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Vector: SSVCv2/E:N/A:Y/T:P/P:M/B:A/M:M/D:T/2026-03-10T16:56:19Z/ Found at https://github.com/parse-community/parse-server/security/advisories/GHSA-q342-9w2p-57fp
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-30938
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

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passive

active

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Exploit Prediction Scoring System (EPSS)
Percentile 0.21009
EPSS Score 0.00067
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-02T04:51:34.543487+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/parse-server/CVE-2026-30938.yml 38.6.0