Design documents with matching document IDs, from databases on the same cluster, may share a mutable Javascript environment when using these design document functions:
* validate_doc_update

* list

* filter

* filter views (using view functions as filters)

* rewrite

* update

This doesn’t affect map/reduce or search (Dreyfus) index functions.

Users are recommended to upgrade to a version that is no longer affected by this issue (Apache CouchDB 3.3.2 or 3.2.3).

Workaround: Avoid using design documents from untrusted sources which may attempt to cache or store data in the Javascript environment.

Source: CVE-2023-26268

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