diff --git a/src/Symfony/Component/Validator/Constraints/IbanValidator.php b/src/Symfony/Component/Validator/Constraints/IbanValidator.php
index 3ed971cb47de6..b7deeca155b7a 100644
--- a/src/Symfony/Component/Validator/Constraints/IbanValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/IbanValidator.php
@@ -179,8 +179,8 @@ public function validate(mixed $value, Constraint $constraint): void
$value = (string) $value;
- // Remove spaces and convert to uppercase
- $canonicalized = str_replace(' ', '', strtoupper($value));
+ // Remove spaces (regular, non-breaking, and narrow non-breaking) and convert to uppercase
+ $canonicalized = str_replace([' ', "\xc2\xa0", "\xe2\x80\xaf"], '', strtoupper($value));
// The IBAN must contain only digits and characters...
if (!ctype_alnum($canonicalized)) {
diff --git a/src/Symfony/Component/Validator/Tests/Constraints/IbanValidatorTest.php b/src/Symfony/Component/Validator/Tests/Constraints/IbanValidatorTest.php
index af3cf98acba01..834eb3f5dc191 100644
--- a/src/Symfony/Component/Validator/Tests/Constraints/IbanValidatorTest.php
+++ b/src/Symfony/Component/Validator/Tests/Constraints/IbanValidatorTest.php
@@ -77,6 +77,8 @@ public static function getValidIbans()
['FO97 5432 0388 8999 44'], // Faroe Islands
['FI21 1234 5600 0007 85'], // Finland
['FR14 2004 1010 0505 0001 3M02 606'], // France
+ ["FR14\xc2\xa02004\xc2\xa01010\xc2\xa00505\xc2\xa00001\xc2\xa03M02\xc2\xa0606"], // France with non-breaking spaces
+ ["FR14\xe2\x80\xaf2004\xe2\x80\xaf1010\xe2\x80\xaf0505\xe2\x80\xaf0001\xe2\x80\xaf3M02\xe2\x80\xaf606"], // France with narrow non-breaking spaces
['GE29 NB00 0000 0101 9049 17'], // Georgia
['DE89 3704 0044 0532 0130 00'], // Germany
['GI75 NWBK 0000 0000 7099 453'], // Gibraltar
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