diff --git a/src/Symfony/Component/Yaml/Inline.php b/src/Symfony/Component/Yaml/Inline.php
index 5b5f96131af98..712add900a5d0 100644
--- a/src/Symfony/Component/Yaml/Inline.php
+++ b/src/Symfony/Component/Yaml/Inline.php
@@ -531,7 +531,7 @@ private static function parseMapping(string $mapping, int $flags, int &$i = 0, a
if ('<<' === $key) {
$output += $value;
} elseif ($allowOverwrite || !isset($output[$key])) {
- if (!$isValueQuoted && \is_string($value) && '' !== $value && '&' === $value[0] && Parser::preg_match(Parser::REFERENCE_PATTERN, $value, $matches)) {
+ if (!$isValueQuoted && \is_string($value) && '' !== $value && '&' === $value[0] && !self::isBinaryString($value) && Parser::preg_match(Parser::REFERENCE_PATTERN, $value, $matches)) {
$references[$matches['ref']] = $matches['value'];
$value = $matches['value'];
}
diff --git a/src/Symfony/Component/Yaml/Tests/InlineTest.php b/src/Symfony/Component/Yaml/Tests/InlineTest.php
index 07d4e04d4375f..d6e02fad0d4a0 100644
--- a/src/Symfony/Component/Yaml/Tests/InlineTest.php
+++ b/src/Symfony/Component/Yaml/Tests/InlineTest.php
@@ -368,6 +368,9 @@ public static function getTestsForParse()
['[foo, bar: { foo: bar }]', ['foo', '1' => ['bar' => ['foo' => 'bar']]]],
['[foo, \'@foo.baz\', { \'%foo%\': \'foo is %foo%\', bar: \'%foo%\' }, true, \'@service_container\']', ['foo', '@foo.baz', ['%foo%' => 'foo is %foo%', 'bar' => '%foo%'], true, '@service_container']],
+
+ // Binary string not utf8-compliant but starting with and utf8-equivalent "&" character
+ ['{ uid: !!binary Ju0Yh+uqSXOagJZFTlUt8g== }', ['uid' => hex2bin('26ed1887ebaa49739a8096454e552df2')]],
];
}
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