CVE-2025-59830 (GCVE-0-2025-59830)

Vulnerability from cvelistv5 – Published: 2025-09-25 14:37 – Updated: 2025-09-25 16:16
VLAI?
Title
Rack QueryParser has an unsafe default allowing params_limit bypass via semicolon-separated parameters
Summary
Rack is a modular Ruby web server interface. Prior to version 2.2.18, Rack::QueryParser enforces its params_limit only for parameters separated by &, while still splitting on both & and ;. As a result, attackers could use ; separators to bypass the parameter count limit and submit more parameters than intended. Applications or middleware that directly invoke Rack::QueryParser with its default configuration (no explicit delimiter) could be exposed to increased CPU and memory consumption. This can be abused as a limited denial-of-service vector. This issue has been patched in version 2.2.18.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-400 - Uncontrolled Resource Consumption
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
Impacted products
Vendor Product Version
rack rack Affected: < 2.2.18
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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