diff --git a/src/Module/Core/Infrastructure/Security/PermissionVoter.php b/src/Module/Core/Infrastructure/Security/PermissionVoter.php
new file mode 100644
index 0000000..542e220
--- /dev/null
+++ b/src/Module/Core/Infrastructure/Security/PermissionVoter.php
@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Module\Core\Infrastructure\Security;
+
+use App\Module\Core\Domain\Entity\User;
+use Symfony\Component\Security\Core\Authentication\Token\TokenInterface;
+use Symfony\Component\Security\Core\Authorization\Voter\Vote;
+use Symfony\Component\Security\Core\Authorization\Voter\Voter;
+
+/**
+ * @extends Voter<string, mixed>
+ */
+final class PermissionVoter extends Voter
+{
+    private const string PATTERN = '/^[a-z][a-z0-9_]*(\.[a-z][a-z0-9_]*)+$/';
+
+    protected function supports(string $attribute, mixed $subject): bool
+    {
+        return 1 === preg_match(self::PATTERN, $attribute);
+    }
+
+    protected function voteOnAttribute(string $attribute, mixed $subject, TokenInterface $token, ?Vote $vote = null): bool
+    {
+        $user = $token->getUser();
+        if (!$user instanceof User) {
+            return false;
+        }
+
+        // ROLE_ADMIN = bypass total (cf. Décision 1).
+        if (in_array('ROLE_ADMIN', $user->getRoles(), true)) {
+            return true;
+        }
+
+        return in_array($attribute, $user->getEffectivePermissions(), true);
+    }
+}
diff --git a/tests/Unit/Module/Core/Infrastructure/Security/PermissionVoterTest.php b/tests/Unit/Module/Core/Infrastructure/Security/PermissionVoterTest.php
new file mode 100644
index 0000000..c1094f9
--- /dev/null
+++ b/tests/Unit/Module/Core/Infrastructure/Security/PermissionVoterTest.php
@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Module\Core\Infrastructure\Security;
+
+use App\Module\Core\Domain\Entity\Permission;
+use App\Module\Core\Domain\Entity\Role;
+use App\Module\Core\Domain\Entity\User;
+use App\Module\Core\Infrastructure\Security\PermissionVoter;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\Security\Core\Authentication\Token\UsernamePasswordToken;
+use Symfony\Component\Security\Core\Authorization\Voter\VoterInterface;
+
+/**
+ * @internal
+ */
+final class PermissionVoterTest extends TestCase
+{
+    public function testAbstainsOnNonRbacAttributes(): void
+    {
+        $voter = new PermissionVoter();
+        $user  = new User();
+        self::assertSame(VoterInterface::ACCESS_ABSTAIN, $voter->vote($this->token($user), null, ['ROLE_ADMIN']));
+        self::assertSame(VoterInterface::ACCESS_ABSTAIN, $voter->vote($this->token($user), null, ['IS_AUTHENTICATED_FULLY']));
+    }
+
+    public function testGrantsWhenUserHasPermissionViaRole(): void
+    {
+        $voter = new PermissionVoter();
+        $role  = new Role('bureau', 'Bureau');
+        $role->addPermission(new Permission('core.users.view', 'Voir', 'core'));
+        $user = new User();
+        $user->addRbacRole($role);
+
+        self::assertSame(VoterInterface::ACCESS_GRANTED, $voter->vote($this->token($user), null, ['core.users.view']));
+        self::assertSame(VoterInterface::ACCESS_DENIED, $voter->vote($this->token($user), null, ['core.users.manage']));
+    }
+
+    public function testAdminBypassesViaRole(): void
+    {
+        $voter = new PermissionVoter();
+        $user  = new User();
+        $user->setRoles(['ROLE_ADMIN']);
+
+        self::assertSame(VoterInterface::ACCESS_GRANTED, $voter->vote($this->token($user), null, ['core.users.manage']));
+    }
+
+    private function token(User $user): UsernamePasswordToken
+    {
+        return new UsernamePasswordToken($user, 'main', $user->getRoles());
+    }
+}