CredentialedCorsUsesWildcardOrigin

warning native on by default

Group: Security

Browsers reject a wildcard CORS origin for credentialed requests. Return an explicit allowed origin instead.

Example

<?php
header("Access-Control-Allow-Origin: *"); header("Access-Control-Allow-Credentials: true");

Reported:

• line 2: Use an explicit origin for credentialed CORS.

Detection

• Resolved header calls in same response scope definitely set Access-Control-Allow-Origin to * and Access-Control-Allow-Credentials to true, case-insensitive. Account for later replacement/removal and unknown control flow.
• The supported initial proof uses a contiguous block of known header and header_remove operations. Account for the final replacement/removal state, and do not treat unknown later operations as proof that the conflicting headers remain final.
• Resolve builtin functions, classes, constants and methods; user-defined lookalikes are excluded. Follow only bounded local proof in one lexical scope.
• Emit one finding per violating operation, not per supporting evidence statement. When the proof is inconclusive, nothing is reported.

Exceptions (no report)

• Do not report unresolved or shadowed builtin names, unknown values, or incomplete receiver/type provenance. Unknown calls, aliases escaping, and intervening writes invalidate local proof. Similar code outside the stated detection contract is not a finding.
• Both standard suppression forms suppress this native ID.

Fix

None. Choosing a repair requires intent or additional runtime information.

PHP versions

Available throughout supported PHP 5.3–8.5 where the referenced builtin/extension is available. Respect syntax/version-specific receiver contracts; unavailable APIs are not this rule’s concern.

Configure

In custos.json:

{
  "rules": {
    "CredentialedCorsUsesWildcardOrigin": {
      "enabled": false
    }
  }
}

Suppress

Before the statement or declaration (or the first statement of the file):

// @custos-ignore CredentialedCorsUsesWildcardOrigin