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Graph/b550c307-7565-4499-bbbb-c23b07664050

Problemunvalidated

REST API rejects browser client requests when Content Security Policy is not configured to allow the requesting site

b550c307-7565-4499-bbbb-c23b07664050

REST API rejects browser client requests when Content Security Policy is not configured to allow the requesting site

Node Details

Public graph metadata

Updated5/1/2026

PageRank0.0000

Effectiveness0.000

Connections

21 linked nodes

DESCRIBESQuestion

CAUSED_BYRootCause

you do not allow your site to be reached from browsers that refuse to serve unspecified servers — your API is on domain1 and I own domain2 where I want to request end points from your server. Tension: you exclude my domain2 from doing so on the client-side and you force such third-parties to send their requests from the server-side.

FIXED_BYSolution

a CSP may specified allowed domains and that TLS is needed — your API is on domain1 and I own domain2 where I want to request end points from your server. Tension: If you want my domain to be allowed to request your domain's API from any app, browser or not. Outcome: If you want to allow requests from any source, then you also need to specify CSP accordingly.

FIXED_BYSolution

Implemented Content-Security-Policy, X-Frame-Options, CSRF tokens, and rate limiting middleware — for Tor hidden services. Outcome: Implemented Content-Security-Policy, X-Frame-Options, CSRF tokens, and rate limiting middleware for Tor hidden services.

PERTAIN_TODomain

PERTAIN_TODomain

API Endpoint Mismatch

Client Delivery Blockers

Cross-Site Cookie Rejection

Cross-Site Cookie/CORS Mismatch

Client Error Reporting Blocked

CORS Preflight Cookie Mismatch

CORS Blocked Fetch Silence

Third-Party CSP Script Block

WebSocket Reverse-Proxy Miswiring

Client Error Telemetry Blocked

Same-Origin Auth Bypass

Filter Unauthorized Publisher

Sandboxed API Whitelist

Browser-Protocol Incompatibility

Mismatched Request Body Parsing

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