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Rack::Session::Cookie secrets: decrypt failure fallback enables secretless session forgery and Marshal deserialization

🗓️ 08 Apr 2026 00:15:08Reported by GitHub Advisory DatabaseType 
github
 github
🔗 github.com👁 5 Views

Rack::Session::Cookie secrets decrypt failures fall back to default decoder, enabling forged sessions.

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13 May 2026 16:21Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.19.8
CVSS 49.3
EPSS0.0027
SSVC
5