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POC Details: 99532e573bd2a8faf2fe54741acdab9bfcb625fd

Source
https://github.com/projectdiscovery/nuclei-templates/blob/main/http/misconfiguration/oidc-signing-alg-none-supported.yaml
Associated Vulnerability
OpenID Connect - Unsigned (alg none) ID Token Supported Detection template
Description
The OpenID Connect discovery document advertises "none" among its id_token_signing_alg_values_supported, meaning the authorization server is willing to issue ID tokens with no signature. A relying party that accepts such a token cannot verify its integrity, enabling JWT "alg:none" forgery and authentication bypass. The "none" algorithm should never be offered for ID tokens in production.
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