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SOLR-18215 JWT auth module now defaults to blockUnknown=true #4373

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SOLR-18215 JWT auth module now defaults to blockUnknown=true #4373

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5695216
JWT auth: change blockUnknown default from false to true
janhoy Apr 28, 2026
b4204c0
SOLR-18215: Add changelog entry for blockUnknown default change
janhoy Apr 28, 2026
b2776ad
Update solr/solr-ref-guide/modules/upgrade-notes/pages/major-changes-…
janhoy Apr 28, 2026
f9aa38a
Update solr/webapp/web/js/angular/controllers/security.js
janhoy Apr 28, 2026
6f31790
Add a test
janhoy Apr 28, 2026
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8 changes: 8 additions & 0 deletions changelog/unreleased/SOLR-18215-jwt-auth-blockUnknown-default-true.yml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
title: JWT Authentication `blockUnknown` now defaults to `true`, blocking unauthenticated requests by default. Previously the code defaulted to `false` despite the reference guide documenting `true`. Users relying on pass-through must explicitly set `blockUnknown` to `false` in their security.json.
type: changed
authors:
- name: Jan Høydahl
url: https://home.apache.org/phonebook.html?uid=janhoy
links:
- name: SOLR-18215
url: https://issues.apache.org/jira/browse/SOLR-18215
2 changes: 1 addition & 1 deletion solr/modules/jwt-auth/src/java/org/apache/solr/security/jwt/JWTAuthPlugin.java
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Expand Up @@ -171,7 +171,7 @@ public void init(Map<String, Object> pluginConfig) {
}

blockUnknown =
Boolean.parseBoolean(String.valueOf(pluginConfig.getOrDefault(PARAM_BLOCK_UNKNOWN, false)));
Boolean.parseBoolean(String.valueOf(pluginConfig.getOrDefault(PARAM_BLOCK_UNKNOWN, true)));
requireIssuer =
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Boolean.parseBoolean(
String.valueOf(pluginConfig.getOrDefault(PARAM_REQUIRE_ISSUER, "true")));
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1 change: 1 addition & 0 deletions solr/modules/jwt-auth/src/test/org/apache/solr/security/jwt/JWTAuthPluginTest.java
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Expand Up @@ -510,6 +510,7 @@ public void wellKnownConfigNoHeaderPassThrough() {
.toString();
testConfig.put("wellKnownUrl", wellKnownUrl);
testConfig.remove("jwk");
testConfig.put("blockUnknown", false);
plugin.init(testConfig);
JWTAuthPlugin.JWTAuthenticationResponse resp = plugin.authenticate(null);
assertEquals(PASS_THROUGH, resp.getAuthCode());
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6 changes: 6 additions & 0 deletions solr/solr-ref-guide/modules/upgrade-notes/pages/major-changes-in-solr-10.adoc
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Expand Up @@ -43,6 +43,12 @@ Former users of `solr.api.v2.enabled` looking to upgrade to Solr 10.1 or newer s

Users who deploy a proxy in front of Solr should also review this setup to ensure that it allows access to the v2 API root path, `/api`.

=== JWT Authentication

The `blockUnknown` setting in the JWT Authentication plugin now defaults to `true`, meaning requests without a valid JWT token are blocked by default.
In Solr 10.0, the code default was `false` (pass-through), which contradicted the reference guide documentation that described `true` as the default.
Users upgrading from 10.0 who relied on the pass-through behavior must explicitly set `blockUnknown: false` in their `security.json`.
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== Solr 10.0

=== Solr Jetty parameters
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4 changes: 2 additions & 2 deletions solr/webapp/web/js/angular/controllers/security.js
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Expand Up @@ -242,7 +242,7 @@ solrAdminApp.controller('SecurityController', function ($scope, $timeout, $cooki
$scope.hideAll();

$scope.tls = false;
$scope.blockUnknown = "false"; // default setting
$scope.blockUnknown = "true"; // default setting
$scope.realmName = "solr";
$scope.forwardCredentials = "false";
$scope.multiAuthWithBasic = false;
Expand Down Expand Up @@ -371,7 +371,7 @@ solrAdminApp.controller('SecurityController', function ($scope, $timeout, $cooki

//console.log(">> authn: "+JSON.stringify(authn));

$scope.blockUnknown = authn["blockUnknown"] === true ? "true" : "false";
$scope.blockUnknown = authn["blockUnknown"] === false ? "false" : "true";
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$scope.forwardCredentials = authn["forwardCredentials"] === true ? "true" : "false";

if ("realm" in authn) {
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