diff --git a/backend/app/services/scrapers/stealth.py b/backend/app/services/scrapers/stealth.py
index a1408f64..db02ad0c 100644
--- a/backend/app/services/scrapers/stealth.py
+++ b/backend/app/services/scrapers/stealth.py
@@ -57,7 +57,9 @@ def parse_proxy_url(proxy_url: str | None) -> dict[str, str] | None:
         return None
     parts = urlsplit(proxy_url)
     if not parts.hostname:
-        raise ValueError(f"proxy URL без host: {proxy_url!r}")
+        # НЕ эхо-им сырой proxy_url — он содержит пароль, а это исключение
+        # всплывает в kn_scrape_runs.error / log_progress / Sentry (#1945 sec-review).
+        raise ValueError(f"proxy URL без host (scheme={parts.scheme!r})")
     scheme = parts.scheme or "http"
     server = f"{scheme}://{parts.hostname}"
     if parts.port:
diff --git a/backend/tests/services/scrapers/test_stealth_throttle_proxy.py b/backend/tests/services/scrapers/test_stealth_throttle_proxy.py
index ac14a973..a1582e76 100644
--- a/backend/tests/services/scrapers/test_stealth_throttle_proxy.py
+++ b/backend/tests/services/scrapers/test_stealth_throttle_proxy.py
@@ -69,6 +69,17 @@ class TestParseProxyUrl:
         with pytest.raises(ValueError):
             parse_proxy_url("http://:8080")
 
+    def test_error_does_not_leak_credentials(self) -> None:
+        # ValueError всплывает в kn_scrape_runs.error / log_progress / Sentry —
+        # НЕ должен содержать пароль (#1945 sec-review).
+        bad = "http://secretuser:secretpass@:8080"  # есть creds, но нет host
+        with pytest.raises(ValueError) as exc:
+            parse_proxy_url(bad)
+        msg = str(exc.value)
+        assert "secretpass" not in msg
+        assert "secretuser" not in msg
+        assert bad not in msg
+
 
 class TestBrowserSessionThrottleThreading:
     """concurrency/jitter/proxy прокидываются в инстанс-поля BrowserSession."""