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CVE-2026-34230 Rack: Quadratic complexity in Rack::Utils.select_best_encoding via wildcard Accept-Encoding header

🗓️ 02 Apr 2026 16:41:21Reported by GitHub_MType 
cvelist
 cvelist
🔗 www.cve.org👁 14 Views

CVE-2026-34230: Rack fixes quadratic time in Accept-Encoding processing to prevent denial of service via Deflater.

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Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-34230
2 Apr 202616:41
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Security Bulletin: Multiple vulnerabilities in IBM Aspera Console
16 Apr 202622:21
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CVE-2026-34230 vulnerabilities
6 Apr 202601:18
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CNNVD
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2 Apr 202600:00
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2 Apr 202616:41
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Debian CVE
CVE-2026-34230
2 Apr 202616:41
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EUVD
EUVD-2026-18378
2 Apr 202620:32
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Github Security Blog
Rack has quadratic complexity in Rack::Utils.select_best_encoding via wildcard Accept-Encoding header
2 Apr 202620:32
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NVD
CVE-2026-34230
2 Apr 202617:16
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OSV
CGA-HFG4-P2P9-PVFR
6 Apr 202600:30
osv
Rows per page
[
  {
    "vendor": "rack",
    "product": "rack",
    "versions": [
      {
        "version": "< 2.2.23",
        "status": "affected"
      },
      {
        "version": ">= 3.0.0.beta1, < 3.1.21",
        "status": "affected"
      },
      {
        "version": ">= 3.2.0, < 3.2.6",
        "status": "affected"
      }
    ]
  }
]

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