.. Licensed under the Apache License, Version 2.0 (the "License"); you may not
.. use this file except in compliance with the License. You may obtain a copy of
.. the License at
..
..   http://www.apache.org/licenses/LICENSE-2.0
..
.. Unless required by applicable law or agreed to in writing, software
.. distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
.. WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
.. License for the specific language governing permissions and limitations under
.. the License.

.. _cve/2026-90798:

===========================================================================
CVE-2026-90798: Replicator follows redirects indefinitely
===========================================================================

:Date: 12.10.2026

:Affected: 3.5.2 and below

:Severity: Medium

:Vendor: The Apache Software Foundation

Description
===========

The CouchDB replicator follows HTTP redirects indefinitely. This allowed a
malicious replication endpoint to cause a denial of service for individual
replication jobs.

Mitigation
==========

Existing retry limits are now applied for all replicator requests. After 5
retries the replication job fails with a ``too_many_redirects error``.

Workarounds
===========

N/A

Credit
======

The CouchDB team discovered this issue while reviewing independent reports from
Piotr Karwasz, Sec-Rex & ZeroVuln Labs.