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Vulnerability details: VCID-4geq-pnnp-3fd8
Vulnerability ID VCID-4geq-pnnp-3fd8
Aliases CVE-2026-30925
GHSA-mf3j-86qx-cq5j
Summary Parse Server has Regular Expression Denial of Service (ReDoS) via `$regex` query in LiveQuery A malicious client can subscribe to a LiveQuery with a crafted `$regex` pattern that causes catastrophic backtracking, blocking the Node.js event loop. This makes the entire Parse Server unresponsive, affecting all clients. Any Parse Server deployment with LiveQuery enabled is affected. The attacker only needs the application ID and JavaScript key, both of which are public in client-side apps. This only affects LiveQuery subscription matching, which evaluates regex in JavaScript on the Node.js event loop. Normal REST and GraphQL queries are not affected because their regex is evaluated by the database engine.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1333 Inefficient Regular Expression Complexity
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 0.00021 https://api.first.org/data/v1/epss?cve=CVE-2026-30925
epss 0.00021 https://api.first.org/data/v1/epss?cve=CVE-2026-30925
epss 0.00021 https://api.first.org/data/v1/epss?cve=CVE-2026-30925
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-mf3j-86qx-cq5j
cvssv4 8.2 https://github.com/parse-community/parse-server
generic_textual HIGH https://github.com/parse-community/parse-server
cvssv4 8.2 https://github.com/parse-community/parse-server/releases/tag/8.6.11
generic_textual HIGH https://github.com/parse-community/parse-server/releases/tag/8.6.11
ssvc Track https://github.com/parse-community/parse-server/releases/tag/8.6.11
cvssv4 8.2 https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.14
generic_textual HIGH https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.14
ssvc Track https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.14
cvssv3.1_qr HIGH https://github.com/parse-community/parse-server/security/advisories/GHSA-mf3j-86qx-cq5j
cvssv4 8.2 https://github.com/parse-community/parse-server/security/advisories/GHSA-mf3j-86qx-cq5j
generic_textual HIGH https://github.com/parse-community/parse-server/security/advisories/GHSA-mf3j-86qx-cq5j
ssvc Track https://github.com/parse-community/parse-server/security/advisories/GHSA-mf3j-86qx-cq5j
cvssv4 8.2 https://nvd.nist.gov/vuln/detail/CVE-2026-30925
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-30925
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-30925
https://github.com/parse-community/parse-server
https://github.com/parse-community/parse-server/releases/tag/8.6.11
https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.14
CVE-2026-30925 https://nvd.nist.gov/vuln/detail/CVE-2026-30925
GHSA-mf3j-86qx-cq5j https://github.com/advisories/GHSA-mf3j-86qx-cq5j
GHSA-mf3j-86qx-cq5j https://github.com/parse-community/parse-server/security/advisories/GHSA-mf3j-86qx-cq5j
No exploits are available.
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/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:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Found at https://github.com/parse-community/parse-server/releases/tag/8.6.11
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:Y/T:P/P:M/B:A/M:M/D:T/2026-03-10T14:08:58Z/ Found at https://github.com/parse-community/parse-server/releases/tag/8.6.11
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Found at https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.14
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/2026-03-10T14:08:58Z/ Found at https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.14
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Found at https://github.com/parse-community/parse-server/security/advisories/GHSA-mf3j-86qx-cq5j
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/2026-03-10T14:08:58Z/ Found at https://github.com/parse-community/parse-server/security/advisories/GHSA-mf3j-86qx-cq5j
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-30925
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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present

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Exploit Prediction Scoring System (EPSS)
Percentile 0.06056
EPSS Score 0.00021
Published At June 5, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-02T04:51:35.181699+00:00 GitLab Importer Import https://gitlab.com/gitlab-org/advisories-community/-/blob/main/npm/parse-server/CVE-2026-30925.yml 38.6.0