diff --git a/benchmark/data/tasks/ecvebench-rustracts-001.json b/benchmark/data/tasks/ecvebench-rustracts-001.json
new file mode 100644
index 00000000..c6299b92
--- /dev/null
+++ b/benchmark/data/tasks/ecvebench-rustracts-001.json
@@ -0,0 +1,35 @@
+{
+  "task_id": "ecvebench-rustracts-001",
+  "ghsa_id": "GHSA-xwxc-j97j-84gf",
+  "codebase": {
+    "repo": "https://github.com/hyyking/rustracts",
+    "language": "rust",
+    "ecosystem": "rust",
+    "commit": "c15541d7968aea40d06dadd5e2c5cb57b4d6d341"
+  },
+  "hints": {
+    "L0": null,
+    "L1": {
+      "area": "Concurrency trait implementations and thread-safety guarantees for smart pointer types"
+    },
+    "L2": {
+      "description": "A data race vulnerability exists where a smart pointer type unconditionally implements the Send trait without requiring the inner type to be Sync. This allows concurrent access to non-Sync data from multiple threads, leading to undefined behavior such as data races."
+    },
+    "L3": {
+      "area": "Thread-safety trait bounds for weak reference types in the shared ownership smart pointer module",
+      "description": "A data race vulnerability exists where a weak reference smart pointer type unconditionally implements the Send trait without requiring the inner type to be Sync. This allows enclosing non-Sync data and accessing it concurrently from multiple threads via child references, leading to undefined behavior including data races and potential memory corruption."
+    }
+  },
+  "ground_truth": {
+    "vulnerable": true,
+    "vuln_class": "race-condition",
+    "cvss": 8.1,
+    "reason": "LockWeak<T> unconditionally implements Send without requiring T: Sync, allowing concurrent access to non-Sync data from multiple threads, which causes undefined behavior such as data races.",
+    "locations": [
+      {
+        "file": "parc/src/lib.rs",
+        "function": null
+      }
+    ]
+  }
+}
diff --git a/benchmark/internal/metadata/GHSA-xwxc-j97j-84gf.json b/benchmark/internal/metadata/GHSA-xwxc-j97j-84gf.json
new file mode 100644
index 00000000..5cac2790
--- /dev/null
+++ b/benchmark/internal/metadata/GHSA-xwxc-j97j-84gf.json
@@ -0,0 +1,8 @@
+{
+  "ghsa_id": "GHSA-xwxc-j97j-84gf",
+  "post_patch_commit": "5e43ee86e6a67153ff65da2051f6eb0a77f2c6b8",
+  "noisy_patch": false,
+  "curation_notes": "Patch is PR #6 (merged as 5e43ee8) in hyyking/rustracts. Only one source file changed: parc/src/lib.rs. The fix adds a Sync bound to the unsafe Send impl for LockWeak<T>, preventing concurrent access to non-Sync data. Pre-assigned class race-condition (CWE-362) is correct — the vulnerability is an unsound Send impl enabling data races. Location derived directly from the patch diff; no sibling files exist in parc/src/.",
+  "dataset_version": "0.1.0",
+  "snapshot_date": "2026-04-26"
+}