Papermerge Core up to 3.5.3 Authorization Check group_id improper authorization

Summaryinfo

A vulnerability was found in Papermerge Core up to 3.5.3. It has been classified as problematic. The affected element is an unknown function of the component Authorization Check. This manipulation of the argument group_id causes improper authorization. The identification of this vulnerability is CVE-2026-110624. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Papermerge Core up to 3.5.3. It has been declared as problematic. Affected by this vulnerability is an unknown code block of the component Authorization Check. The manipulation of the argument group_id with an unknown input leads to a improper authorization vulnerability. The CWE definition for the vulnerability is CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-110624 since 10/14/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/14/2026). The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Papermerge

Name

• Core

Version

• 3.5.0
• 3.5.1
• 3.5.2
• 3.5.3

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