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Vulnerability details: VCID-w51h-8rx9-5yaw
Vulnerability ID VCID-w51h-8rx9-5yaw
Aliases CVE-2026-30229
GHSA-79wj-8rqv-jvp5
Summary parse-server's endpoint `/loginAs` allows `readOnlyMasterKey` to gain full read and write access as any user The `readOnlyMasterKey` can call `POST /loginAs` to obtain a valid session token for any user. This allows a read-only credential to impersonate arbitrary users with full read and write access to their data. Any Parse Server deployment that uses `readOnlyMasterKey` is affected.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
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 0.00024 https://api.first.org/data/v1/epss?cve=CVE-2026-30229
epss 0.00024 https://api.first.org/data/v1/epss?cve=CVE-2026-30229
epss 0.00024 https://api.first.org/data/v1/epss?cve=CVE-2026-30229
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-79wj-8rqv-jvp5
cvssv4 8.5 https://github.com/parse-community/parse-server
generic_textual HIGH https://github.com/parse-community/parse-server
cvssv4 8.5 https://github.com/parse-community/parse-server/releases/tag/8.6.6
generic_textual HIGH https://github.com/parse-community/parse-server/releases/tag/8.6.6
ssvc Track https://github.com/parse-community/parse-server/releases/tag/8.6.6
cvssv4 8.5 https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.4
generic_textual HIGH https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.4
ssvc Track https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.4
cvssv3.1_qr HIGH https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5
cvssv4 8.5 https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5
generic_textual HIGH https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5
ssvc Track https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5
cvssv4 8.5 https://nvd.nist.gov/vuln/detail/CVE-2026-30229
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-30229
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-30229
https://github.com/parse-community/parse-server
https://github.com/parse-community/parse-server/releases/tag/8.6.6
https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.4
CVE-2026-30229 https://nvd.nist.gov/vuln/detail/CVE-2026-30229
GHSA-79wj-8rqv-jvp5 https://github.com/advisories/GHSA-79wj-8rqv-jvp5
GHSA-79wj-8rqv-jvp5 https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/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:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/parse-community/parse-server/releases/tag/8.6.6
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: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-09T20:29:01Z/ Found at https://github.com/parse-community/parse-server/releases/tag/8.6.6
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.4
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:N/T:P/P:M/B:A/M:M/D:T/2026-03-09T20:29:01Z/ Found at https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.4
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5
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

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-03-09T20:29:01Z/ Found at https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-30229
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

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present

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passive

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Exploit Prediction Scoring System (EPSS)
Percentile 0.07196
EPSS Score 0.00024
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-02T04:51:24.646865+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/parse-server/CVE-2026-30229.yml 38.6.0