diff --git a/src/domain/explicitSensitiveFailure.test.ts b/src/domain/explicitSensitiveFailure.test.ts
index 2a882c7500..82dc095870 100644
--- a/src/domain/explicitSensitiveFailure.test.ts
+++ b/src/domain/explicitSensitiveFailure.test.ts
@@ -198,6 +198,49 @@ it("redacts cleanup primaries and mirrors the source error's live status", () =>
   });
 });
 
+it("retains sanitized finalization failures and their independent cleanup status", () => {
+  const primary = new AnalysisInputError("inspect_web_network_capture", {
+    userMessage: "declared-marker capture is invalid",
+  });
+  const reason = new Error("cancelled during reply finalization");
+  const cancellation = new AnalysisCancelledError(
+    "inspect_web_network_capture",
+    { cause: reason, diagnostics: { note: "declared-marker finalization" } },
+  );
+  const cleanup = new ProviderCleanupError(
+    "har",
+    ["/tmp/declared-marker-runtime"],
+    { reason: "declared-marker runtime close failed" },
+    { operation: "inspect_web_network_capture" },
+  );
+  primary.retainSecondaryFailure(cancellation);
+  primary.retainSecondaryFailure(cleanup);
+
+  const redacted = redactExplicitFailure(primary, ["declared-marker"]);
+  const [retainedCancellation, retainedCleanup] = redacted.secondaryFailures;
+  expect(retainedCancellation).toBeInstanceOf(AnalysisCancelledError);
+  expect(retainedCancellation?.cause).toBe(reason);
+  expect(retainedCleanup).toBeInstanceOf(ProviderCleanupError);
+  expect(retainedCleanup?.cleanupIncomplete).toBe(true);
+  expect(redacted.cleanupIncomplete).toBe(false);
+  const projected = projectAnalysisError(redacted);
+  expect(projected.code).toBe("invalid_request");
+  expect(projected.details?.secondary_failures).toMatchObject([
+    {
+      code: "cancelled",
+      details: { diagnostics: { note: "[REDACTED] finalization" } },
+    },
+    {
+      code: "cleanup_incomplete",
+      details: { resources: ["/tmp/[REDACTED]-runtime"] },
+    },
+  ]);
+  expect(JSON.stringify(projected)).not.toContain("declared-marker");
+  cleanup.resolveCleanup();
+  expect(retainedCleanup?.cleanupIncomplete).toBe(false);
+  expect(redacted.cleanupIncomplete).toBe(false);
+});
+
 it("keeps a named timeout control through explicit-value redaction", () => {
   const error = new AnalysisTimeoutError(
     "analyze_javascript_application",
diff --git a/src/domain/explicitSensitiveFailure.ts b/src/domain/explicitSensitiveFailure.ts
index 4c7cd25114..fe626b462c 100644
--- a/src/domain/explicitSensitiveFailure.ts
+++ b/src/domain/explicitSensitiveFailure.ts
@@ -84,6 +84,9 @@ export const redactSensitiveFailure = (
   // Other observation owners already apply their format-aware exclusions.
   if (redacted !== error && error.partialObservation !== undefined)
     redacted.retainPartialObservation(error.partialObservation);
+  if (redacted !== error)
+    for (const secondary of error.secondaryFailures)
+      redacted.retainSecondaryFailure(redactSensitiveFailure(secondary, text));
   return redacted === error ? error : mirrorCleanup(error, redacted, text);
 };