Vulnerability Details CVE-2025-59830
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 18.4%
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2025-59830
-
cpe:2.3:a:rack:rack:0.1
-
cpe:2.3:a:rack:rack:0.2
-
cpe:2.3:a:rack:rack:0.3
-
cpe:2.3:a:rack:rack:0.4
-
cpe:2.3:a:rack:rack:0.9
-
cpe:2.3:a:rack:rack:0.9.1
-
cpe:2.3:a:rack:rack:1.0
-
cpe:2.3:a:rack:rack:1.0.1
-
cpe:2.3:a:rack:rack:1.1
-
cpe:2.3:a:rack:rack:1.1.2
-
cpe:2.3:a:rack:rack:1.1.3
-
cpe:2.3:a:rack:rack:1.1.4
-
cpe:2.3:a:rack:rack:1.1.5
-
cpe:2.3:a:rack:rack:1.1.6
-
cpe:2.3:a:rack:rack:1.2
-
cpe:2.3:a:rack:rack:1.2.1
-
cpe:2.3:a:rack:rack:1.2.2
-
cpe:2.3:a:rack:rack:1.2.3
-
cpe:2.3:a:rack:rack:1.2.4
-
cpe:2.3:a:rack:rack:1.2.5
-
cpe:2.3:a:rack:rack:1.2.6
-
cpe:2.3:a:rack:rack:1.2.7
-
cpe:2.3:a:rack:rack:1.2.8
-
cpe:2.3:a:rack:rack:1.3.0
-
cpe:2.3:a:rack:rack:1.3.1
-
cpe:2.3:a:rack:rack:1.3.10
-
cpe:2.3:a:rack:rack:1.3.2
-
cpe:2.3:a:rack:rack:1.3.3
-
cpe:2.3:a:rack:rack:1.3.4
-
cpe:2.3:a:rack:rack:1.3.5
-
cpe:2.3:a:rack:rack:1.3.6
-
cpe:2.3:a:rack:rack:1.3.7
-
cpe:2.3:a:rack:rack:1.3.8
-
cpe:2.3:a:rack:rack:1.3.9
-
cpe:2.3:a:rack:rack:1.4.0
-
cpe:2.3:a:rack:rack:1.4.1
-
cpe:2.3:a:rack:rack:1.4.2
-
cpe:2.3:a:rack:rack:1.4.3
-
cpe:2.3:a:rack:rack:1.4.4
-
cpe:2.3:a:rack:rack:1.4.5
-
cpe:2.3:a:rack:rack:1.4.6
-
cpe:2.3:a:rack:rack:1.4.7
-
cpe:2.3:a:rack:rack:1.5.0
-
cpe:2.3:a:rack:rack:1.5.1
-
cpe:2.3:a:rack:rack:1.5.2
-
cpe:2.3:a:rack:rack:1.5.3
-
cpe:2.3:a:rack:rack:1.5.4
-
cpe:2.3:a:rack:rack:1.5.5
-
cpe:2.3:a:rack:rack:1.6.0
-
cpe:2.3:a:rack:rack:1.6.1
-
cpe:2.3:a:rack:rack:1.6.10
-
cpe:2.3:a:rack:rack:1.6.11
-
cpe:2.3:a:rack:rack:1.6.12
-
cpe:2.3:a:rack:rack:1.6.13
-
cpe:2.3:a:rack:rack:1.6.2
-
cpe:2.3:a:rack:rack:1.6.3
-
cpe:2.3:a:rack:rack:1.6.4
-
cpe:2.3:a:rack:rack:1.6.5
-
cpe:2.3:a:rack:rack:1.6.6
-
cpe:2.3:a:rack:rack:1.6.7
-
cpe:2.3:a:rack:rack:1.6.8
-
cpe:2.3:a:rack:rack:1.6.9
-
cpe:2.3:a:rack:rack:2.0.0
-
cpe:2.3:a:rack:rack:2.0.1
-
cpe:2.3:a:rack:rack:2.0.2
-
cpe:2.3:a:rack:rack:2.0.3
-
cpe:2.3:a:rack:rack:2.0.4
-
cpe:2.3:a:rack:rack:2.0.5
-
cpe:2.3:a:rack:rack:2.0.6
-
cpe:2.3:a:rack:rack:2.0.7
-
cpe:2.3:a:rack:rack:2.0.8
-
cpe:2.3:a:rack:rack:2.0.9
-
cpe:2.3:a:rack:rack:2.0.9.2
-
cpe:2.3:a:rack:rack:2.0.9.3
-
cpe:2.3:a:rack:rack:2.1.0
-
cpe:2.3:a:rack:rack:2.1.1
-
cpe:2.3:a:rack:rack:2.1.2
-
cpe:2.3:a:rack:rack:2.1.3
-
cpe:2.3:a:rack:rack:2.1.4
-
cpe:2.3:a:rack:rack:2.1.4.2
-
cpe:2.3:a:rack:rack:2.1.4.3
-
cpe:2.3:a:rack:rack:2.2.0
-
cpe:2.3:a:rack:rack:2.2.1
-
cpe:2.3:a:rack:rack:2.2.10
-
cpe:2.3:a:rack:rack:2.2.11
-
cpe:2.3:a:rack:rack:2.2.12
-
cpe:2.3:a:rack:rack:2.2.13
-
cpe:2.3:a:rack:rack:2.2.14
-
cpe:2.3:a:rack:rack:2.2.15
-
cpe:2.3:a:rack:rack:2.2.16
-
cpe:2.3:a:rack:rack:2.2.17
-
cpe:2.3:a:rack:rack:2.2.2
-
cpe:2.3:a:rack:rack:2.2.3
-
cpe:2.3:a:rack:rack:2.2.4
-
cpe:2.3:a:rack:rack:2.2.4.1
-
cpe:2.3:a:rack:rack:2.2.5
-
cpe:2.3:a:rack:rack:2.2.6
-
cpe:2.3:a:rack:rack:2.2.6.1
-
cpe:2.3:a:rack:rack:2.2.6.2
-
cpe:2.3:a:rack:rack:2.2.6.3
-
cpe:2.3:a:rack:rack:2.2.6.4
-
cpe:2.3:a:rack:rack:2.2.7
-
cpe:2.3:a:rack:rack:2.2.8
-
cpe:2.3:a:rack:rack:2.2.8.1
-
cpe:2.3:a:rack:rack:2.2.9