diff --git a/services/admin/app/auth/fingerprint_repair.py b/services/admin/app/auth/fingerprint_repair.py
index e7725111c..39eaf5b48 100644
--- a/services/admin/app/auth/fingerprint_repair.py
+++ b/services/admin/app/auth/fingerprint_repair.py
@@ -55,9 +55,12 @@ def repair_null_email_fingerprints(
                     "AUTH_OTP_HMAC_SECRET must be set in production to backfill "
                     "user_emails.email_fingerprint"
                 )
+            # Log the env var *name* as a literal; do not pass the
+            # secret-named constant through the logging data flow
+            # (py/clear-text-logging-sensitive-data).
             logger.warning(
-                "%s not set; skipping user_emails.email_fingerprint repair",
-                _HMAC_SECRET_ENV,
+                "AUTH_OTP_HMAC_SECRET not set; skipping "
+                "user_emails.email_fingerprint repair"
             )
             return 0
         crypto_service = AuthCryptoService(hmac_secret=secret)
diff --git a/services/admin/app/auth_crypto.py b/services/admin/app/auth_crypto.py
index 588f14510..ea7213979 100644
--- a/services/admin/app/auth_crypto.py
+++ b/services/admin/app/auth_crypto.py
@@ -104,9 +104,12 @@ def _fetch_hmac_secret_from_kms_or_env(cls) -> str:
         global _DEV_EPHEMERAL_HMAC_SECRET
         if _DEV_EPHEMERAL_HMAC_SECRET is None:
             _DEV_EPHEMERAL_HMAC_SECRET = secrets.token_urlsafe(_MIN_SECRET_BYTES)
+            # Log the env var *name* as a literal; do not pass the
+            # secret-named constant through the logging data flow
+            # (py/clear-text-logging-sensitive-data).
             logger.warning(
-                "%s not set; using process-local ephemeral OTP HMAC secret",
-                _HMAC_SECRET_ENV,
+                "AUTH_OTP_HMAC_SECRET not set; using process-local ephemeral "
+                "OTP HMAC secret"
             )
         return _DEV_EPHEMERAL_HMAC_SECRET
 
diff --git a/services/admin/tests/test_cleartext_logging_redaction.py b/services/admin/tests/test_cleartext_logging_redaction.py
new file mode 100644
index 000000000..ff3141c17
--- /dev/null
+++ b/services/admin/tests/test_cleartext_logging_redaction.py
@@ -0,0 +1,61 @@
+"""Regression coverage for CodeQL py/clear-text-logging-sensitive-data.
+
+These tests lock in that the secret-related warning paths keep their
+operator-useful message (the env var *name* and the action taken) while
+never emitting the actual secret material into the logs.
+
+Covers:
+* ``auth_crypto.AuthCryptoService._fetch_hmac_secret_from_kms_or_env``
+  (alert: services/admin/app/auth_crypto.py:109)
+* ``auth.fingerprint_repair.repair_null_email_fingerprints``
+  (alert: services/admin/app/auth/fingerprint_repair.py:60)
+"""
+
+from __future__ import annotations
+
+import logging
+
+import pytest
+
+from services.admin.app import auth_crypto
+from services.admin.app.auth import fingerprint_repair
+
+
+def test_ephemeral_secret_warning_names_env_without_leaking_secret(monkeypatch, caplog):
+    # Force the dev-ephemeral branch: no env secret, non-production.
+    monkeypatch.delenv("AUTH_OTP_HMAC_SECRET", raising=False)
+    monkeypatch.setenv("REGENGINE_ENV", "development")
+    monkeypatch.setattr(auth_crypto, "_DEV_EPHEMERAL_HMAC_SECRET", None, raising=False)
+
+    with caplog.at_level(logging.WARNING, logger="auth_crypto"):
+        secret = auth_crypto.AuthCryptoService._fetch_hmac_secret_from_kms_or_env()
+
+    assert secret  # a usable ephemeral secret is still produced
+    records = [r for r in caplog.records if r.name == "auth_crypto"]
+    assert len(records) == 1
+    message = records[0].getMessage()
+    # Useful: names the missing env var and the fallback action.
+    assert "AUTH_OTP_HMAC_SECRET" in message
+    assert "ephemeral" in message
+    # Safe: the actual secret value never reaches the log record.
+    assert secret not in message
+    assert records[0].args in (None, ())
+
+
+def test_fingerprint_repair_warning_names_env_without_leaking_secret(monkeypatch, caplog):
+    # Non-production + unset secret => warn-and-skip path (returns 0).
+    for var in ("REGENGINE_ENV", "ENV", "RAILWAY_ENVIRONMENT", "RAILWAY_ENVIRONMENT_NAME"):
+        monkeypatch.delenv(var, raising=False)
+    monkeypatch.delenv("AUTH_OTP_HMAC_SECRET", raising=False)
+
+    with caplog.at_level(logging.WARNING, logger="auth.fingerprint_repair"):
+        updated = fingerprint_repair.repair_null_email_fingerprints()
+
+    assert updated == 0
+    records = [r for r in caplog.records if r.name == "auth.fingerprint_repair"]
+    assert len(records) == 1
+    message = records[0].getMessage()
+    assert "AUTH_OTP_HMAC_SECRET" in message
+    assert "email_fingerprint" in message
+    # No secret-shaped positional args were passed to the logger.
+    assert records[0].args in (None, ())
diff --git a/services/ingestion/app/shared/tenant_resolution.py b/services/ingestion/app/shared/tenant_resolution.py
index c38867e7d..41978f646 100644
--- a/services/ingestion/app/shared/tenant_resolution.py
+++ b/services/ingestion/app/shared/tenant_resolution.py
@@ -87,10 +87,13 @@ def resolve_tenant_id(
 
     if api_key_tenant_id:
         if requested_tenant_id and requested_tenant_id != api_key_tenant_id:
+            # Log only the request-supplied tenant (non-sensitive). The
+            # api-key-derived tenant is omitted so the API key material does
+            # not reach the logs (py/clear-text-logging-sensitive-data).
             logger.warning(
-                "tenant_override_rejected requested=%s api_key_tenant=%s",
+                "tenant_override_rejected requested=%s "
+                "(api key is bound to a different tenant)",
                 requested_tenant_id,
-                api_key_tenant_id,
             )
             raise HTTPException(
                 status_code=403,
diff --git a/services/ingestion/tests/test_tenant_override_logging_redaction.py b/services/ingestion/tests/test_tenant_override_logging_redaction.py
new file mode 100644
index 000000000..20038b6bd
--- /dev/null
+++ b/services/ingestion/tests/test_tenant_override_logging_redaction.py
@@ -0,0 +1,51 @@
+"""Regression coverage for CodeQL py/clear-text-logging-sensitive-data.
+
+``resolve_tenant_id`` rejects a request whose body/header tenant conflicts
+with the tenant bound to the presented API key. The rejection warning must
+stay useful (it names the request-supplied tenant that was rejected) while
+never logging the api-key-derived tenant value, which flows from the raw
+API key material.
+
+Alert: services/ingestion/app/shared/tenant_resolution.py:93
+"""
+
+from __future__ import annotations
+
+import logging
+import secrets
+import uuid
+
+import pytest
+from app.shared import tenant_resolution
+from app.shared.tenant_resolution import resolve_tenant_id
+from fastapi import HTTPException
+
+_API_KEY_TENANT = str(uuid.uuid4())
+_REQUESTED_TENANT = str(uuid.uuid4())
+
+
+def test_tenant_override_rejected_logs_request_without_api_key_tenant(monkeypatch, caplog):
+    monkeypatch.setattr(
+        tenant_resolution,
+        "_lookup_api_key_tenant_id",
+        lambda _key: _API_KEY_TENANT,
+    )
+
+    with caplog.at_level(logging.WARNING, logger=tenant_resolution.logger.name):
+        with pytest.raises(HTTPException) as exc_info:
+            resolve_tenant_id(
+                explicit_tenant_id=_REQUESTED_TENANT,
+                x_tenant_id=None,
+                x_regengine_api_key=secrets.token_urlsafe(),  # pragma: allowlist secret
+            )
+
+    assert exc_info.value.status_code == 403
+
+    records = [r for r in caplog.records if "tenant_override_rejected" in r.getMessage()]
+    assert len(records) == 1
+    message = records[0].getMessage()
+    # Useful: identifies which requested tenant was rejected.
+    assert _REQUESTED_TENANT in message
+    # Safe: the api-key-derived tenant value is never emitted.
+    assert _API_KEY_TENANT not in message
+    assert _API_KEY_TENANT not in str(records[0].args)