CyberRota Analysis
AI-GeneratedThe ash_authentication_oauth2_server is vulnerable due to improper caching of tenant-specific OAuth discovery metadata, allowing a shared HTTP cache to serve one tenant's sensitive information to another tenant's clients. This misconfiguration can lead to unauthorized access, where clients may inadvertently send authorization codes and secrets to incorrect token endpoints, potentially compromising security. Organizations utilizing versions from 0.1.3 to before 0.3.1 should prioritize remediation to prevent cross-tenant data exposure.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
Use of Cache Containing Sensitive Information vulnerability in ash-project ash_authentication_oauth2_server allows a shared HTTP cache to serve one tenant's OAuth discovery metadata to another tenant's clients. The RFC 8414 and RFC 9728 metadata endpoints in AshAuthentication.Phoenix.Oauth2Server.ProtocolRouter return tenant-specific values (issuer, authorization_endpoint, token_endpoint, jwks_uri) when a tenant is set, but sent them with Cache-Control: public, max-age=3600 and no Vary. When the tenant is derived from something other than the URL (a header or the Host) and a shared cache sits in front, the cache key is the URL alone, so a stored response for one tenant is served to another for up to an hour. Affected clients may then send authorization codes and secrets to the wrong tenant's token endpoint and validate tokens against the wrong keys. This issue affects ash_authentication_oauth2_server: from 0.1.3 before 0.3.1.