diff --git a/.jules/sentinel.md b/.jules/sentinel.md
index 2da382f934..8f253bb750 100644
--- a/.jules/sentinel.md
+++ b/.jules/sentinel.md
@@ -51,3 +51,4 @@
 **Vulnerability:** Denial of Service / Availability
 **Learning:** Strix security scanners crashed when the backend LLM returned an 'HTTP Error 502: Bad Gateway' response. This was because 'bad gateway' string match and generic 'APIError' were missing from the `is_llm_api_connection_error` function in the Strix retry gate.
 **Prevention:** Always include `bad gateway` and `APIError` in string match conditions when handling HTTP API Connection exceptions for LLM backends to ensure proper fail-closed and retry handling.
+## 2026-09-29 - Prevent Semgrep SSRF false positive\n**Vulnerability:** Server-Side Request Forgery (SSRF) / False Positive\n**Learning:** Semgrep flags urllib.request.urlopen as a potential SSRF or LFI vulnerability if it reads from a dynamic URL. In our maturin asset fetcher, the URL is strictly prefixed by a hardcoded GitHub releases path, mitigating this risk, but the scanner still warns. \n**Prevention:** Added `nosec` and `nosemgrep` comments specifically to the `urlopen` call after validating that the URL construction is secure and cannot be manipulated by untrusted user input.
diff --git a/scripts/ci/strix_report_scope.py b/scripts/ci/strix_report_scope.py
index 44de1c441d..856e74a744 100644
--- a/scripts/ci/strix_report_scope.py
+++ b/scripts/ci/strix_report_scope.py
@@ -32,7 +32,7 @@ def validate(output: Path, changed_paths: list[str]) -> None:
         raise ValueError("scan report does not identify a changed source file")
 
 
-if __name__ == "__main__":
+if __name__ == "__main__":  # pragma: no cover
     try:
         validate(Path(sys.argv[1]), sys.argv[2:])
     except (IndexError, OSError, ValueError, TypeError) as error:
diff --git a/scripts/ci/verify_release_distribution_set.py b/scripts/ci/verify_release_distribution_set.py
index 1779d5dfde..0307cadf59 100644
--- a/scripts/ci/verify_release_distribution_set.py
+++ b/scripts/ci/verify_release_distribution_set.py
@@ -251,6 +251,7 @@ def fetch_artifact(repository: str, artifact_id: int, output: BinaryIO) -> None:
     process = subprocess.Popen(
         ["gh", "api", f"repos/{repository}/actions/artifacts/{artifact_id}/zip"],
         stdout=subprocess.PIPE,
+        shell=False,
     )
     try:
         while block := process.stdout.read(1024 * 1024):
diff --git a/scripts/ci/verify_release_maturin_tool_assets.py b/scripts/ci/verify_release_maturin_tool_assets.py
index 90fa1517b7..5554f15bd4 100644
--- a/scripts/ci/verify_release_maturin_tool_assets.py
+++ b/scripts/ci/verify_release_maturin_tool_assets.py
@@ -33,7 +33,10 @@
 
 def _download(filename: str) -> bytes:
     url = f"https://github.com/PyO3/maturin/releases/download/v1.15.0/{filename}"
-    with urlopen(Request(url, headers={"User-Agent": "cwl-release-gate"}), timeout=60) as response:
+    # Fixed https origin and tag; verify_assets admits only five literal asset names.
+    with urlopen(  # nosemgrep: python.lang.security.audit.dynamic-urllib-use-detected.dynamic-urllib-use-detected  # nosec B310
+        Request(url, headers={"User-Agent": "cwl-release-gate"}), timeout=60
+    ) as response:
         raw = response.read(MAX_ASSET_BYTES + 1)
     if len(raw) > MAX_ASSET_BYTES:
         raise ValueError("maturin release asset exceeds inspection limit")
diff --git a/tests/test_strix_report_scope.py b/tests/test_strix_report_scope.py
index 3ff7964659..084a13ef49 100644
--- a/tests/test_strix_report_scope.py
+++ b/tests/test_strix_report_scope.py
@@ -24,3 +24,54 @@ def test_report_scope_rejects_unrelated_success_and_accepts_scoped_success(tmp_p
     report.write_text("Assessed python/fast_mlsirm/report.py; no vulnerabilities found.\n", encoding="utf-8")
     assert subprocess.run(command, capture_output=True).returncode == 0
     assert subprocess.run(command[:-1], capture_output=True).returncode == 1
+
+def test_validate_exceptions(tmp_path: Path) -> None:
+    import scripts.ci.strix_report_scope as strix_report_scope
+    import pytest
+
+    with pytest.raises(ValueError, match="scan output directory is missing"):
+        strix_report_scope.validate(tmp_path / "nonexistent", [])
+
+    run = tmp_path / "current-scan"
+    run.mkdir()
+
+    with pytest.raises(ValueError, match="scan report files are missing or linked"):
+        strix_report_scope.validate(tmp_path, [])
+
+    (run / "run.json").write_text("[]", encoding="utf-8")
+    (run / "penetration_test_report.md").write_text("", encoding="utf-8")
+
+    with pytest.raises(ValueError, match="scan metadata is not an object"):
+        strix_report_scope.validate(tmp_path, [])
+
+    (run / "run.json").write_text(json.dumps({"status": "completed", "scan_results": "[]"}), encoding="utf-8")
+    with pytest.raises(ValueError, match="scan results are not an object"):
+        strix_report_scope.validate(tmp_path, [])
+
+    (run / "run.json").write_text(json.dumps({"scan_results": {}}), encoding="utf-8")
+    with pytest.raises(ValueError, match="scan report is incomplete"):
+        strix_report_scope.validate(tmp_path, [])
+
+    (run / "run.json").write_text(json.dumps({"status": "completed"}), encoding="utf-8")
+    with pytest.raises(ValueError, match="scan report is incomplete"):
+        strix_report_scope.validate(tmp_path, [])
+
+    (run / "run.json").write_text(json.dumps({"status": "completed", "scan_results": {"scan_completed": True, "success": False}}), encoding="utf-8")
+    with pytest.raises(ValueError, match="scan report is incomplete"):
+        strix_report_scope.validate(tmp_path, [])
+
+    (run / "run.json").write_text(json.dumps({"status": "completed", "scan_results": {"scan_completed": False, "success": True}}), encoding="utf-8")
+    with pytest.raises(ValueError, match="scan report is incomplete"):
+        strix_report_scope.validate(tmp_path, ["python/fast_mlsirm/report.py"])
+
+    (run / "run.json").write_text(json.dumps({"status": "completed", "scan_results": {"scan_completed": True, "success": True}}), encoding="utf-8")
+    with pytest.raises(ValueError, match="scan report does not identify a changed source file"):
+        strix_report_scope.validate(tmp_path, ["python/fast_mlsirm/report.py"])
+
+    (run / "penetration_test_report.md").write_text("python/fast_mlsirm/report.py", encoding="utf-8")
+    strix_report_scope.validate(tmp_path, ["python/fast_mlsirm/report.py"])
+
+    run2 = tmp_path / "another-scan"
+    run2.mkdir(parents=True)
+    with pytest.raises(ValueError, match="expected exactly one current scan report"):
+        strix_report_scope.validate(tmp_path, [])
diff --git a/tests/test_verify_release_distribution_set.py b/tests/test_verify_release_distribution_set.py
index d8b8b08eae..4859dcd126 100644
--- a/tests/test_verify_release_distribution_set.py
+++ b/tests/test_verify_release_distribution_set.py
@@ -460,7 +460,7 @@ def kill(self):
 
     processes: list[Process] = []
 
-    def popen(_args, stdout):
+    def popen(_args, stdout, shell=False):
         assert stdout is subprocess.PIPE
         process = processes.pop(0)
         return process
@@ -539,7 +539,7 @@ def wait() -> int:
         def poll() -> int:
             return 0
 
-    def popen(args, stdout):
+    def popen(args, stdout, shell=False):
         assert stdout is subprocess.PIPE
         artifact_id = int(args[2].split("/")[-2])
         return Process(case["archives"][artifact_id])
diff --git a/tests/test_verify_release_scope_evidence_set.py b/tests/test_verify_release_scope_evidence_set.py
index 449754b2b3..c83c7cd3d9 100644
--- a/tests/test_verify_release_scope_evidence_set.py
+++ b/tests/test_verify_release_scope_evidence_set.py
@@ -1458,7 +1458,7 @@ def wait() -> int:
         def poll() -> int:
             return 0
 
-    def popen(args, stdout):
+    def popen(args, stdout, shell=False):
         assert stdout is subprocess.PIPE
         artifact_id = int(args[2].split("/")[-2])
         return Process(case["archives"][artifact_id])