CVE-2026-110624 papermerge CVE debrief

Who should care

Defenders responsible for Papermerge Core installations, particularly in environments where authenticated users may be able to exploit this issue, should assess exposure and prioritize remediation.

Why it matters

This vulnerability allows authenticated users to list other groups' tags and document types, potentially leading to unauthorized access and disclosure of metadata.

• Authenticated users may be able to disclose metadata of groups they do not belong to
• Defenders need to verify and remediate this vulnerability to prevent potential unauthorized access

Technical summary

The vulnerability exists in Papermerge Core through 3.5.3, allowing authenticated users to list other groups' tags and document types by supplying a group_id parameter. This issue arises from insufficient authorization checks in the affected endpoints. 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. Defenders should prioritize verifying and remediating this vulnerability in Papermerge Core installations, particularly in environments where authenticated users may be able to exploit this issue.

Defensive priority

Defenders should prioritize verifying and remediating this vulnerability in Papermerge Core installations, particularly in environments where authenticated users may be able to exploit this issue.

Recommended defensive actions

• Verify Papermerge Core version and check if it is affected by this vulnerability
• Restrict access to /tags/all and /document-types/all endpoints
• Implement proper authorization checks for authenticated users
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the missing authorization vulnerability in Papermerge Core through 3.5.3. The vulnerability allows authenticated users to list other groups' tags and document types.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.