Publish iso20022 test data

CITATION.cff

@@ -4,7 +4,7 @@ title: "ISO 20022 Test Data"
 abstract: "Well-formed pain.001.001.09 Customer Credit Transfer Initiation XML with synthetic debtors, creditors, and amounts."
 type: dataset
 license: CC0-1.0
-version: "1.0.1"
+version: "1.0.2"
 date-released: "2026-10-01"
 authors:
   - name: "StanzaAPI"

README.md

@@ -41,7 +41,7 @@ https://stanzaapi.com/datasets/iso20022
 
 ## Security: adversarial corpus
 
-This dataset ships a catalogued **adversarial corpus** of 10 hostile inputs
+This dataset ships a catalogued **adversarial corpus** of 12 hostile inputs
 (injection, XXE, resource exhaustion, encoding attacks, validation bypass, structural confusion,
 and prompt injection for AI agents) with the safe expected behaviour. See
 [`adversarial/`](adversarial/) or the [hub](https://stanzaapi.com/datasets/adversarial).

adversarial/iso20022-adversarial.json

@@ -4,7 +4,7 @@
   "source": "https://stanzaapi.com/datasets/iso20022/adversarial",
   "license": "CC0-1.0",
   "format": "iso20022",
-  "count": 10,
+  "count": 12,
   "cases": [
     {
       "id": "iso20022-xxe",
@@ -115,6 +115,30 @@
       "expected": "Parameterise every insert of parsed fields.",
       "rationale": "Parsed XML lands in databases; unparameterised inserts are injectable.",
       "cwe": "CWE-89"
+    },
+    {
+      "id": "iso20022-bom-prefix",
+      "format": "iso20022",
+      "category": "encoding",
+      "severity": "medium",
+      "title": "Byte-order mark before the XML declaration",
+      "payload": "<?xml version=\"1.0\" encoding=\"UTF-8\"?><Document/>",
+      "expected": "Handle the BOM once, at the byte boundary, and strip it before the parser sees it. Do not let one layer keep it and another reject it.",
+      "rationale": "A BOM before the declaration is a parser differential: strict XML parsers reject it and lenient ones strip it, so the same message is valid in one system and malformed in another.",
+      "cwe": "CWE-20",
+      "evades": "well-formedness (if the BOM is stripped)"
+    },
+    {
+      "id": "iso20022-duplicate-element",
+      "format": "iso20022",
+      "category": "structure",
+      "severity": "high",
+      "title": "Duplicate amount element resolved by last-wins",
+      "payload": "<Amt><InstdAmt Ccy=\"EUR\">1.00</InstdAmt><InstdAmt Ccy=\"EUR\">999999.00</InstdAmt></Amt>",
+      "expected": "Reject duplicate elements that the schema marks as maxOccurs=1 rather than letting the parser pick one.",
+      "rationale": "Schema-invalid but well-formed XML. A DOM parser that keeps the last value and a streaming parser that keeps the first settle different amounts, so two conforming systems disagree about the payment.",
+      "cwe": "CWE-20",
+      "evades": "well-formedness"
     }
   ]
 }