CVE-2026-110624

Papermerge Core through 3.5.3 contains a missing authorization vulnerability that allows authenticated users to list other groups' tags and document types by supplying a group_id parameter. Attackers who know a group's UUID can query GET /tags/all or GET /document-types/all, which skip the user_belongs_to check, to disclose metadata of groups they do not belong to.

• https://github.com/papermerge/papermerge-core/blob/3.5.3/papermerge/core/features/document_types/router.py#L37-L62
• https://github.com/papermerge/papermerge-core/blob/3.5.3/papermerge/core/features/tags/router.py#L39-L64
• https://github.com/papermerge/papermerge-core/commit/0fd469102b05b5ebeb5ee39b3f73ff76991ab269
• https://github.com/papermerge/papermerge-core/issues/1291
• https://www.vulncheck.com/advisories/papermerge-core-through-3.5.3-missing-authorization-via-tags-all-and-document-types-all