diff --git a/src/server/auth-cors.ts b/src/server/auth-cors.ts
index 5b4d48c21..497e23b41 100644
--- a/src/server/auth-cors.ts
+++ b/src/server/auth-cors.ts
@@ -70,16 +70,6 @@ export function isSameOriginAsRequest(req: Request, origin: string): boolean {
 }
 
 export function isAllowedRequestOrigin(req: Request, config: OcxConfig): boolean {
-  function isExtraAllowedOrigin(origin: string, cfg: OcxConfig): boolean {
-    if (!cfg.corsAllowOrigins?.length) return false;
-    return cfg.corsAllowOrigins.some(allowed => {
-      try {
-        return new URL(allowed).origin === new URL(origin).origin;
-      } catch {
-        return allowed === origin;
-      }
-    });
-  }
   const origin = req.headers.get("Origin");
   if (!isApiAuthRequired(config)) {
     if (!isLoopbackRequestHost(req.headers.get("Host"))) return false;
@@ -88,6 +78,17 @@ export function isAllowedRequestOrigin(req: Request, config: OcxConfig): boolean
   return !origin || isLoopbackOriginValue(origin) || isSameOriginAsRequest(req, origin) || isExtraAllowedOrigin(origin, config);
 }
 
+function isExtraAllowedOrigin(origin: string, cfg: OcxConfig): boolean {
+  if (!cfg.corsAllowOrigins?.length) return false;
+  return cfg.corsAllowOrigins.some(allowed => {
+    try {
+      return new URL(allowed).origin === new URL(origin).origin;
+    } catch {
+      return allowed === origin;
+    }
+  });
+}
+
 export function managementRequestOrigin(req: Request, config: OcxConfig): string | null {
   const host = req.headers.get("Host");
   const parsedHost = parseHttpHost(host);
@@ -106,7 +107,9 @@ export function isAllowedManagementOrigin(req: Request, config: OcxConfig): bool
   const requestOrigin = managementRequestOrigin(req, config);
   if (!requestOrigin) return false;
   const origin = req.headers.get("Origin");
-  return !origin || origin === requestOrigin;
+  // Exact match against the process-derived origin, or an operator-listed corsAllowOrigins
+  // entry (covers TLS-terminator https://… when the process observes http://…).
+  return !origin || origin === requestOrigin || isExtraAllowedOrigin(origin, config);
 }
 
 export function browserSecurityHeaders(): Record<string, string> {
diff --git a/tests/management-origin-tls.test.ts b/tests/management-origin-tls.test.ts
new file mode 100644
index 000000000..ede00e3ef
--- /dev/null
+++ b/tests/management-origin-tls.test.ts
@@ -0,0 +1,102 @@
+import { describe, expect, test } from "bun:test";
+import { isAllowedManagementOrigin } from "../src/server/auth-cors";
+import type { OcxConfig } from "../src/types";
+
+function config(partial: Partial<OcxConfig> = {}): OcxConfig {
+  return {
+    port: 10100,
+    hostname: "0.0.0.0",
+    providers: {},
+    ...partial,
+  } as OcxConfig;
+}
+
+describe("management origin behind TLS termination (#760)", () => {
+  test("does not auto-admit https Origin when Host is http without corsAllowOrigins", () => {
+    const req = new Request("http://127.0.0.1:10100/api/v2", {
+      method: "PUT",
+      headers: {
+        Host: "proxy.example.com",
+        Origin: "https://proxy.example.com",
+      },
+    });
+    expect(isAllowedManagementOrigin(req, config())).toBe(false);
+  });
+
+  test("admits https Origin listed in corsAllowOrigins on a remote bind", () => {
+    const req = new Request("http://127.0.0.1:10100/api/v2", {
+      method: "PUT",
+      headers: {
+        Host: "proxy.example.com",
+        Origin: "https://proxy.example.com",
+      },
+    });
+    expect(isAllowedManagementOrigin(req, config({
+      corsAllowOrigins: ["https://proxy.example.com"],
+    }))).toBe(true);
+  });
+
+  test("admits OPTIONS preflight for an allowlisted https Origin", () => {
+    const req = new Request("http://127.0.0.1:10100/api/v2", {
+      method: "OPTIONS",
+      headers: {
+        Host: "proxy.example.com",
+        Origin: "https://proxy.example.com",
+      },
+    });
+    expect(isAllowedManagementOrigin(req, config({
+      corsAllowOrigins: ["https://proxy.example.com"],
+    }))).toBe(true);
+  });
+
+  test("still rejects a different Origin host", () => {
+    const req = new Request("http://127.0.0.1:10100/api/v2", {
+      method: "PUT",
+      headers: {
+        Host: "proxy.example.com",
+        Origin: "https://evil.example.com",
+      },
+    });
+    expect(isAllowedManagementOrigin(req, config({
+      corsAllowOrigins: ["https://proxy.example.com"],
+    }))).toBe(false);
+  });
+
+  test("still rejects same-scheme cross-port Origins", () => {
+    const req = new Request("http://127.0.0.1:10100/api/config", {
+      method: "GET",
+      headers: {
+        Host: "127.0.0.1:10100",
+        Origin: "http://127.0.0.1:65534",
+      },
+    });
+    expect(isAllowedManagementOrigin(req, config({ hostname: "127.0.0.1" }))).toBe(false);
+  });
+
+  test("rejects allowlisted host on a different public port", () => {
+    const req = new Request("http://proxy.example.com/api/config", {
+      method: "GET",
+      headers: {
+        Host: "proxy.example.com",
+        Origin: "https://proxy.example.com:4443",
+      },
+    });
+    expect(isAllowedManagementOrigin(req, config({
+      hostname: "0.0.0.0",
+      corsAllowOrigins: ["https://proxy.example.com"],
+    }))).toBe(false);
+  });
+
+  test("honours corsAllowOrigins for an explicit external origin", () => {
+    const req = new Request("http://127.0.0.1:10100/api/v2", {
+      method: "PUT",
+      headers: {
+        Host: "internal.example.com",
+        Origin: "https://dashboard.example.com",
+      },
+    });
+    expect(isAllowedManagementOrigin(req, config({
+      corsAllowOrigins: ["https://dashboard.example.com"],
+    }))).toBe(true);
+  });
+});
diff --git a/tests/storage-cleanup.test.ts b/tests/storage-cleanup.test.ts
index eecdf5e19..f91bba392 100644
--- a/tests/storage-cleanup.test.ts
+++ b/tests/storage-cleanup.test.ts
@@ -458,6 +458,8 @@ describe("executeArchivedCleanup", () => {
     expect(existsSync(join(home, ".trash", "77", "rollout-old.jsonl"))).toBe(false);
   });
 
+  // Windows CI: permanent cleanup + spawn/dynamic-tool SQLite work can exceed Bun's
+  // default 5s under runner load (timed out at 5.5s on PR #779).
   test("deletes spawn edges with parent_thread_id/child_thread_id and cascades dynamic tools", () => {
     home = buildHome({ withSpawnEdges: true, withDynamicTools: true });
     // Delete both sides of the edge together so referenced_history does not fire.
@@ -467,7 +469,7 @@ describe("executeArchivedCleanup", () => {
     expect(db.query("SELECT COUNT(*) AS n FROM thread_spawn_edges").get() as { n: number }).toEqual({ n: 0 });
     expect(db.query("SELECT COUNT(*) AS n FROM thread_dynamic_tools").get() as { n: number }).toEqual({ n: 0 });
     db.close();
-  });
+  }, { timeout: STORE_BUDGET_MS });
 
   test("rejects candidates still referenced by a live spawn edge", () => {
     home = buildHome({ withSpawnEdges: true });