X-Git-Url: http://source.bookstackapp.com/bookstack/blobdiff_plain/17f7afe12d617358ba59489fb544f339839e7370..refs/pull/5725/head:/app/Access/Oidc/OidcUserinfoResponse.php

diff --git a/app/Access/Oidc/OidcUserinfoResponse.php b/app/Access/Oidc/OidcUserinfoResponse.php
index ffcacb8de..33b8ec806 100644
--- a/app/Access/Oidc/OidcUserinfoResponse.php
+++ b/app/Access/Oidc/OidcUserinfoResponse.php
@@ -11,7 +11,9 @@ class OidcUserinfoResponse implements ProvidesClaims
 
     public function __construct(ResponseInterface $response, string $issuer, array $keys)
     {
-        $contentType = explode(';', $response->getHeader('Content-Type')[0], 2)[0];
+        $contentTypeHeaderValue = $response->getHeader('Content-Type')[0] ?? '';
+        $contentType = strtolower(trim(explode(';', $contentTypeHeaderValue, 2)[0]));
+
         if ($contentType === 'application/json') {
             $this->claims = json_decode($response->getBody()->getContents(), true);
         }