fix(parsers): validate host headers to prevent injection [C2]#544
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lakhansamani merged 1 commit intomainfrom Apr 4, 2026
Merged
fix(parsers): validate host headers to prevent injection [C2]#544lakhansamani merged 1 commit intomainfrom
lakhansamani merged 1 commit intomainfrom
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GetHost() now sanitizes X-Authorizer-URL, X-Forwarded-Proto, and X-Forwarded-Host headers to prevent host header injection that could lead to OAuth redirect hijacking, JWT issuer spoofing, and poisoned password-reset/verification emails. - X-Authorizer-URL: parsed as URL, only http/https scheme allowed, userinfo rejected, path/query/fragment stripped - X-Forwarded-Host: rejects values with path separators, query strings, fragments, userinfo, or header injection characters - Falls back to Request.Host then "localhost" if all headers invalid Fixes: C2 (Critical)
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Summary
Test plan