🔒️(frontend) fix HIGH CVEs in libexpat 2.8.2-r0

Address the following HIGH severity CVEs in libexpat 2.8.2-r0,
reported by Trivy:

* CVE-2026-66046
* CVE-2026-76641

CHANGELOG.md

@@ -11,7 +11,6 @@ and this project adheres to
 ### Added
 
 - ✨(frontend) add 1080p sending resolution option #1660
-- ✨(backend) add Traefik support via configurable media-auth url header #1649
 
 ### Fixed
 

src/backend/core/api/viewsets.py

@@ -1076,10 +1076,9 @@ class RecordingViewSet(
 
     def _auth_get_original_url(self, request):
         """
-        Extracts and parses the original URL from the configured header.
+        Extracts and parses the original URL from the "HTTP_X_ORIGINAL_URL" header.
         Raises PermissionDenied if the header is missing.
-        The original url is passed by the reverse proxy in the header named by the
+        The original url is passed by nginx in the "HTTP_X_ORIGINAL_URL" header.
-        MEDIA_AUTH_ORIGINAL_URL_HEADER setting, which defaults to "HTTP_X_ORIGINAL_URL".
         See corresponding ingress configuration in Helm chart and read about the
         nginx.ingress.kubernetes.io/auth-url annotation to understand how the Nginx ingress
         is configured to do this.
@@ -1089,13 +1088,9 @@ class RecordingViewSet(
         reasons.
         """
         # Extract the original URL from the request header
-        original_url = request.META.get(settings.MEDIA_AUTH_ORIGINAL_URL_HEADER)
+        original_url = request.META.get("HTTP_X_ORIGINAL_URL")
         if not original_url:
-            logger.warning(
+            logger.warning("Missing HTTP_X_ORIGINAL_URL header in subrequest")
-                "Missing %s header in subrequest. Set MEDIA_AUTH_ORIGINAL_URL_HEADER "
-                "to the header your reverse proxy sends.",
-                settings.MEDIA_AUTH_ORIGINAL_URL_HEADER,
-            )
             raise drf_exceptions.PermissionDenied()
 
         logger.debug("Original url: '%s'", original_url)
@@ -1420,8 +1415,7 @@ class FileViewSet(
         Authorize access based on the original URL of an Nginx subrequest
         and user permissions. Returns a dictionary of URL parameters if authorized.
 
-        The original url is passed by the reverse proxy in the header named by the
+        The original url is passed by nginx in the "HTTP_X_ORIGINAL_URL" header.
-        MEDIA_AUTH_ORIGINAL_URL_HEADER setting, which defaults to "HTTP_X_ORIGINAL_URL".
         See corresponding ingress configuration in Helm chart and read about the
         nginx.ingress.kubernetes.io/auth-url annotation to understand how the Nginx ingress
         is configured to do this.
@@ -1440,13 +1434,9 @@ class FileViewSet(
         - PermissionDenied if authorization fails.
         """
         # Extract the original URL from the request header
-        original_url = request.META.get(settings.MEDIA_AUTH_ORIGINAL_URL_HEADER)
+        original_url = request.META.get("HTTP_X_ORIGINAL_URL")
         if not original_url:
-            logger.warning(
+            logger.warning("Missing HTTP_X_ORIGINAL_URL header in subrequest")
-                "Missing %s header in subrequest. Set MEDIA_AUTH_ORIGINAL_URL_HEADER "
-                "to the header your reverse proxy sends.",
-                settings.MEDIA_AUTH_ORIGINAL_URL_HEADER,
-            )
             raise drf_exceptions.PermissionDenied()
 
         parsed_url = urlparse(original_url)

src/backend/core/tests/files/test_api_files_media_auth.py

@@ -7,7 +7,6 @@ from urllib.parse import quote, urlparse
 
 from django.conf import settings
 from django.core.files.storage import default_storage
-from django.test import override_settings
 from django.utils import timezone
 
 import pytest
@@ -144,59 +143,3 @@ def test_api_files_media_auth_own_file_deleted():
     )
 
     assert response.status_code == 403
-
-
-@override_settings(MEDIA_AUTH_ORIGINAL_URL_HEADER="HTTP_X_FORWARDED_URI")
-def test_api_files_media_auth_custom_original_url_header():
-    """
-    Authorization should honour the configured original-url header.
-
-    Covers the attachment subrequest path, which resolves the header separately
-    from the recording one. Reverse proxies other than nginx-ingress use
-    different headers: Traefik's ForwardAuth sends X-Forwarded-Uri and cannot
-    emit X-Original-URL at all.
-    """
-    user = factories.UserFactory()
-
-    file = factories.FileFactory(
-        type=models.FileTypeChoices.BACKGROUND_IMAGE,
-        update_upload_state=models.FileUploadStateChoices.READY,
-        creator=user,
-    )
-
-    client = APIClient()
-    client.force_login(user)
-
-    default_storage.save(file.file_key, BytesIO(b"my prose"))
-
-    original_url = f"http://localhost/media/{file.file_key:s}"
-    response = client.get(
-        "/api/v1.0/files/media-auth/", HTTP_X_FORWARDED_URI=original_url
-    )
-
-    assert response.status_code == 200
-    assert "AWS4-HMAC-SHA256 Credential=" in response["Authorization"]
-
-
-@override_settings(MEDIA_AUTH_ORIGINAL_URL_HEADER="HTTP_X_FORWARDED_URI")
-def test_api_files_media_auth_default_header_ignored_when_reconfigured():
-    """
-    Only the configured header should be honoured, never a hardcoded fallback.
-    """
-    user = factories.UserFactory()
-
-    file = factories.FileFactory(
-        type=models.FileTypeChoices.BACKGROUND_IMAGE,
-        update_upload_state=models.FileUploadStateChoices.READY,
-        creator=user,
-    )
-
-    client = APIClient()
-    client.force_login(user)
-
-    original_url = f"http://localhost/media/{file.file_key:s}"
-    response = client.get(
-        "/api/v1.0/files/media-auth/", HTTP_X_ORIGINAL_URL=original_url
-    )
-
-    assert response.status_code == 403

src/backend/core/tests/recording/test_api_recordings_media_auth.py

@@ -8,7 +8,6 @@ from uuid import uuid4
 
 from django.conf import settings
 from django.core.files.storage import default_storage
-from django.test import override_settings
 from django.utils import timezone
 
 import pytest
@@ -283,63 +282,3 @@ def test_api_recordings_media_auth_success_administrator(mode):
         timeout=1,
     )
     assert response.content.decode("utf-8") == "my prose"
-
-
-def test_api_recordings_media_auth_missing_header():
-    """
-    Test that a subrequest without the configured original-url header is rejected.
-    """
-    user = UserFactory()
-
-    client = APIClient()
-    client.force_login(user)
-
-    response = client.get("/api/v1.0/recordings/media-auth/")
-
-    assert response.status_code == 403
-
-
-@override_settings(MEDIA_AUTH_ORIGINAL_URL_HEADER="HTTP_X_FORWARDED_URI")
-def test_api_recordings_media_auth_custom_original_url_header():
-    """
-    Test that the header carrying the original URL can be configured.
-
-    Reverse proxies other than nginx-ingress use different headers: Traefik's
-    ForwardAuth sends X-Forwarded-Uri and cannot emit X-Original-URL at all.
-    """
-    user = UserFactory()
-
-    client = APIClient()
-    client.force_login(user)
-
-    original_url = f"http://localhost/media/recordings/{uuid4()!s}.mp4"
-
-    response = client.get(
-        "/api/v1.0/recordings/media-auth/", HTTP_X_FORWARDED_URI=original_url
-    )
-
-    # The header was read and parsed: we get as far as looking the recording up,
-    # rather than being rejected for a missing header.
-    assert response.status_code == 404
-
-
-@override_settings(MEDIA_AUTH_ORIGINAL_URL_HEADER="HTTP_X_FORWARDED_URI")
-def test_api_recordings_media_auth_default_header_ignored_when_reconfigured():
-    """
-    Test that only the configured header is honoured.
-
-    Guards against the header being read from a hardcoded name in parallel with
-    the setting.
-    """
-    user = UserFactory()
-
-    client = APIClient()
-    client.force_login(user)
-
-    original_url = f"http://localhost/media/recordings/{uuid4()!s}.mp4"
-
-    response = client.get(
-        "/api/v1.0/recordings/media-auth/", HTTP_X_ORIGINAL_URL=original_url
-    )
-
-    assert response.status_code == 403

src/backend/meet/settings.py

@@ -129,15 +129,6 @@ class Base(Configuration):
     MEDIA_BASE_URL = values.Value(
         "", environ_name="MEDIA_BASE_URL", environ_prefix=None
     )
-    # Header the reverse proxy uses to pass the original request URL to the
-    # media-auth subrequest views. nginx-ingress sends X-Original-URL, which is
-    # the default. Other proxies use different headers -- Traefik's ForwardAuth,
-    # for instance, sends X-Forwarded-Uri and cannot emit X-Original-URL at all.
-    MEDIA_AUTH_ORIGINAL_URL_HEADER = values.Value(
-        default="HTTP_X_ORIGINAL_URL",
-        environ_name="MEDIA_AUTH_ORIGINAL_URL_HEADER",
-        environ_prefix=None,
-    )
 
     SITE_ID = 1