From 80907cd75d039509c5edfbe8ef6a05f4de7a3d98 Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Thu, 13 Oct 2022 14:07:06 +0200
Subject: [PATCH] Ensure files are readable before reading in JsonFile, fixes
 #11077

---
 src/Composer/Json/JsonFile.php | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/Composer/Json/JsonFile.php b/src/Composer/Json/JsonFile.php
index e850f5ec8..206ee662e 100644
--- a/src/Composer/Json/JsonFile.php
+++ b/src/Composer/Json/JsonFile.php
@@ -93,6 +93,9 @@ class JsonFile
             if ($this->httpDownloader) {
                 $json = $this->httpDownloader->get($this->path)->getBody();
             } else {
+                if (!is_readable($this->path)) {
+                    throw new \RuntimeException('The file "'.$this->path.'" is not readable.');
+                }
                 if ($this->io && $this->io->isDebug()) {
                     $realpathInfo = '';
                     $realpath = realpath($this->path);
@@ -190,6 +193,9 @@ class JsonFile
      */
     public function validateSchema(int $schema = self::STRICT_SCHEMA, ?string $schemaFile = null): bool
     {
+        if (!is_readable($this->path)) {
+            throw new \RuntimeException('The file "'.$this->path.'" is not readable.');
+        }
         $content = file_get_contents($this->path);
         $data = json_decode($content);