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Rack's multipart header parsing allows Denial of Service via escape-heavy quoted parameters

🗓️ 02 Apr 2026 20:30:12Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 4 Views

Rack multipart parser can cause CPU DoS from escape-heavy quoted parameters.

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Detection
Refs
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CVE-2026-34827
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18 Jun 202621:28
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Vulners
Node
rack_projectrackRange3.2.03.2.6rubygems
OR
rack_projectrackRange3.0.0.beta13.1.21rubygems

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13 May 2026 16:18Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.17.5
EPSS0.00376
SSVC
4