CVE-2026-123487
Parse Server 9.0.0 before 9.10.7-alpha.1 ReDoS via Email Validation Regex
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
Parse Server before 8.6.115 and 9.0.0 before 9.10.7-alpha.1 validates user email address format with a regular expression whose run time grows quadratically with input length and that is applied without a length limit. An unauthenticated attacker who knows the application ID can send a sign-up request, or a logged-in user can update their own email, with a long crafted email address to block the Node.js event loop and deny service to all clients.
| CWE | CWE-1333 |
| Vendor | parse-community |
| Product | parse-server |
| Published | Nov 6, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
parse-community / parse-server
9.0.0 < 9.10.7-alpha.1
parse-community / parse-server
0 < 8.6.115
References
Credits
🔍 0xma1ware mtrezza