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Increase max regex length in SpEL expressions #30265

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Increase max regex length in SpEL expressions#30265
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sbrannen
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in: coreIssues in core modules (aop, beans, core, context, expression)status: backportedAn issue that has been backported to maintenance branchestype: regressionA bug that is also a regression
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6.0.8
@agolovenko

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@agolovenko
agolovenko
opened on Apr 2, 2023

In version 6.0.7 of spring-expression there was a method added called checkRegexLength:

spring-framework/spring-expression/src/main/java/org/springframework/expression/spel/ast/OperatorMatches.java

Lines 120 to 125 in 69c8f8e

private void checkRegexLength(String regex) {
if (regex.length() > MAX_REGEX_LENGTH) {
throw new SpelEvaluationException(getStartPosition(),
SpelMessage.MAX_REGEX_LENGTH_EXCEEDED, MAX_REGEX_LENGTH);
}
}

It is adding a 256 char limit check on a length of a regex in a SpEL expression. We actually use longer regexes. Why would you put this limit? Seems quite random.

Please remove this check or at least make that max regex length value configurable.

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in: coreIssues in core modules (aop, beans, core, context, expression)status: backportedAn issue that has been backported to maintenance branchestype: regressionA bug that is also a regression

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