From dd156cba2519e3e8a84bc2cfff066f37e751a9ca Mon Sep 17 00:00:00 2001 From: jmestwa-coder Date: Sun, 21 Jun 2026 19:14:54 +0530 Subject: fix catastrophic backtracking in email domain regex (#2099) --- .../zxing/client/result/EmailAddressParsedResultTestCase.java | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'core/src/test/java') diff --git a/core/src/test/java/com/google/zxing/client/result/EmailAddressParsedResultTestCase.java b/core/src/test/java/com/google/zxing/client/result/EmailAddressParsedResultTestCase.java index ea79c4272..d900d1ddc 100644 --- a/core/src/test/java/com/google/zxing/client/result/EmailAddressParsedResultTestCase.java +++ b/core/src/test/java/com/google/zxing/client/result/EmailAddressParsedResultTestCase.java @@ -52,6 +52,17 @@ public final class EmailAddressParsedResultTestCase extends Assert { assertTrue(EmailDoCoMoResultParser.isBasicallyValidEmailAddress("建設省.aZ456@Ab-cd9Z.co")); } + // A long run of address characters that never completes a valid domain must be rejected + // quickly; the previous pattern backtracked super-linearly on such input. + @Test(timeout = 5000L) + public void testNoCatastrophicBacktracking() { + StringBuilder sb = new StringBuilder("x@"); + for (int i = 0; i < 5000; i++) { + sb.append('a'); + } + assertFalse(EmailDoCoMoResultParser.isBasicallyValidEmailAddress(sb.toString())); + } + @Test public void testEmailAddress() { doTest("srowen@example.org", "srowen@example.org", null, null); -- cgit v1.2.3