diff --git a/packages/mongodb-redact/src/index.spec.ts b/packages/mongodb-redact/src/index.spec.ts
index ca48dbdd..02566a5f 100644
--- a/packages/mongodb-redact/src/index.spec.ts
+++ b/packages/mongodb-redact/src/index.spec.ts
@@ -161,13 +161,82 @@ describe('mongodb-redact', function () {
       expect(res).to.equal('<url>');
     });
 
-    it('should redact MongoDB connection URIs', function () {
-      let res = redact(
-        'mongodb://db1.example.net,db2.example.net:2500/?replicaSet=test&connectTimeoutMS=300000',
-      );
-      expect(res).to.equal('<mongodb uri>');
-      res = redact('mongodb://localhost,localhost:27018,localhost:27019');
-      expect(res).to.equal('<mongodb uri>');
+    describe('MongoDB connection strings', function () {
+      it('should redact MongoDB connection URIs', function () {
+        let res = redact(
+          'mongodb://db1.example.net,db2.example.net:2500/?replicaSet=test&connectTimeoutMS=300000',
+        );
+        expect(res).to.equal('<mongodb uri>');
+        res = redact('mongodb://localhost,localhost:27018,localhost:27019');
+        expect(res).to.equal('<mongodb uri>');
+      });
+
+      it('should redact MongoDB URIs with credentials', function () {
+        let res = redact('mongodb://user:password@localhost:27017/admin');
+        expect(res).to.equal('<mongodb uri>');
+        res = redact('mongodb://admin:secret123@db.example.com/mydb');
+        expect(res).to.equal('<mongodb uri>');
+      });
+
+      it('should redact MongoDB URIs with special characters in usernames and passwords', function () {
+        let res = redact('mongodb://user:p%40ss!word@localhost:27017/');
+        expect(res).to.equal('<mongodb uri>');
+        res = redact('mongodb://ad!min:te%st#123$@db.example.com:27017/');
+        expect(res).to.equal('<mongodb uri>');
+        res = redact('mongodb://!user:my%20pass@localhost/mydb');
+        expect(res).to.equal('<mongodb uri>');
+        res = redact(
+          'mongodb://user:p&ssw!rd#123@host.com:27017/db?authSource=admin',
+        );
+        expect(res).to.equal('<mongodb uri>');
+      });
+
+      it('should redact MongoDB SRV URIs', function () {
+        let res = redact(
+          'mongodb+srv://user:password@cluster0.example.com/test',
+        );
+        expect(res).to.equal('<mongodb uri>');
+        res = redact(
+          'mongodb+srv://admin:secret@mycluster.mongodb.net/mydb?retryWrites=true',
+        );
+        expect(res).to.equal('<mongodb uri>');
+      });
+
+      it('should redact MongoDB URIs with query parameters', function () {
+        let res = redact(
+          'mongodb://localhost:27017/mydb?ssl=true&replicaSet=rs0',
+        );
+        expect(res).to.equal('<mongodb uri>');
+        res = redact(
+          'mongodb://user:pass@host.com/db?authSource=admin&readPreference=primary',
+        );
+        expect(res).to.equal('<mongodb uri>');
+      });
+
+      it('should redact MongoDB URIs with replica sets', function () {
+        let res = redact(
+          'mongodb://host1:27017,host2:27017,host3:27017/?replicaSet=myReplSet',
+        );
+        expect(res).to.equal('<mongodb uri>');
+        res = redact('mongodb://user:pass@host1,host2,host3/db?replicaSet=rs0');
+        expect(res).to.equal('<mongodb uri>');
+      });
+
+      it('should redact MongoDB URIs with IP addresses', function () {
+        let res = redact('mongodb://192.168.1.100:27017/mydb');
+        expect(res).to.equal('<mongodb uri>');
+        res = redact('mongodb://user:password@10.0.0.5:27017/admin');
+        expect(res).to.equal('<mongodb uri>');
+      });
+
+      it('should redact simple MongoDB URIs', function () {
+        let res = redact('mongodb://localhost');
+        expect(res).to.equal('<mongodb uri>');
+        res = redact('mongodb://localhost:27017');
+        expect(res).to.equal('<mongodb uri>');
+        res = redact('mongodb://localhost/mydb');
+        expect(res).to.equal('<mongodb uri>');
+      });
     });
 
     it('should redact general linux/unix user paths', function () {
diff --git a/packages/mongodb-redact/src/regexes.ts b/packages/mongodb-redact/src/regexes.ts
index c4abff94..3266c7a2 100644
--- a/packages/mongodb-redact/src/regexes.ts
+++ b/packages/mongodb-redact/src/regexes.ts
@@ -27,6 +27,9 @@ export const regexes = [
     '$1<email>$6',
   ],
 
+  // MongoDB connection strings
+  [/mongodb(?:\+srv)?:\/\/\S+/gim, '<mongodb uri>'],
+
   // IP addresses
   [
     /((1?[0-9][0-9]?|2[0-4][0-9]|25[0-5])\.){3}(1?[0-9][0-9]?|2[0-4][0-9]|25[0-5])/gm,
@@ -39,12 +42,6 @@ export const regexes = [
     '<url>',
   ],
 
-  // MongoDB connection strings
-  [
-    /(mongodb:\/\/)(www\.)?[-a-zA-Z0-9@:%._+~#=,]{2,256}(\.[a-z]{2,6})?\b([-a-zA-Z0-9@:%_+.~#?&/=]*)/gim,
-    '<mongodb uri>',
-  ],
-
   // Compass Schema URL fragments
   [/#schema\/\w+\.\w+/, '#schema/<namespace>'],
 ] as const;
diff --git a/packages/mongodb-redact/src/secrets.spec.ts b/packages/mongodb-redact/src/secrets.spec.ts
index 3af8b617..ed2ae16e 100644
--- a/packages/mongodb-redact/src/secrets.spec.ts
+++ b/packages/mongodb-redact/src/secrets.spec.ts
@@ -93,4 +93,55 @@ describe('dictionary-based secret redaction', function () {
       usr: '<user>',
     });
   });
+
+  describe('special characters in passwords', function () {
+    it('redacts passwords at start, end, or entire string', function () {
+      expect(
+        redact('!start is pwd', [{ value: '!start', kind: 'password' }]),
+      ).to.equal('<password> is pwd');
+
+      expect(
+        redact('pwd is end!', [{ value: 'end!', kind: 'password' }]),
+      ).to.equal('pwd is <password>');
+
+      expect(
+        redact('The password is !@#$%', [{ value: '!@#$%', kind: 'password' }]),
+      ).to.equal('The password is <password>');
+    });
+
+    it('redacts a special-character only connection string', function () {
+      const secret = '!#!!';
+      const content = 'Connection string: mongodb://!!!#:!#!!@localhost:27017/';
+
+      const redacted = redact(content, [{ value: secret, kind: 'password' }]);
+
+      expect(redacted).to.equal('Connection string: <mongodb uri>');
+    });
+
+    for (const { char, password } of [
+      { char: '.', password: 'test.pass' },
+      { char: '*', password: 'test*pass' },
+      { char: '+', password: 'test+pass' },
+      { char: '?', password: 'test?pass' },
+      { char: '[', password: 'test[123]' },
+      { char: '(', password: 'test(abc)' },
+      { char: '|', password: 'test|pass' },
+      { char: '\\', password: 'test\\pass' },
+      { char: '^', password: '^test123' },
+      { char: '$', password: 'test$123' },
+      { char: '@', password: 'user@123' },
+      { char: '#', password: 'pass#word' },
+      { char: '%', password: 'test%20' },
+      { char: '&', password: 'rock&roll' },
+      { char: 'լավ', password: 'լավ' },
+    ]) {
+      it(`redacts passwords with ${char}`, function () {
+        const content = `pwd: ${password} end`;
+        const redacted = redact(content, [
+          { value: password, kind: 'password' },
+        ]);
+        expect(redacted).to.equal('pwd: <password> end');
+      });
+    }
+  });
 });
diff --git a/packages/mongodb-redact/src/secrets.ts b/packages/mongodb-redact/src/secrets.ts
index 4c0a519e..fe4aa6b8 100644
--- a/packages/mongodb-redact/src/secrets.ts
+++ b/packages/mongodb-redact/src/secrets.ts
@@ -32,7 +32,10 @@ export function redactSecretsOnString<T extends string>(
       );
     }
 
-    const regex = new RegExp(`\\b${escape(value)}\\b`, 'g');
+    // Escape the value for use in regex and use negative lookahead/lookbehind
+    // to match secrets not surrounded by word characters
+    const escapedValue = escape(value);
+    const regex = new RegExp(`(?<!\\w)${escapedValue}(?!\\w)`, 'g');
     result = result.replace(regex, `<${kind}>`) as T;
   }