Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck

CVE-2026-110623Papermerge Core through 3.5.3 Missing Authorization in Shared Nodes API

High 7.5

In plain English

A high-severity missing authorization in papermerge-core from papermerge. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.5%top 57.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Papermerge Core through 3.5.3 contains a missing authorization vulnerability in the shared nodes API that allows authenticated users to share other users' documents by supplying arbitrary node UUIDs. Attackers can call POST /shared-nodes or PATCH /shared-nodes/access/{node_id} to grant themselves any role, then read, modify, or delete victims' documents and revoke existing shares.

Affected products (as reported)

Vendor	Product	Versions
papermerge	papermerge-core	0 – through 3.5.3

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/papermerge/papermerge-core/issues/1290 issue-tracking
https://github.com/papermerge/papermerge-core/issues/1291 issue-tracking
https://github.com/papermerge/papermerge-core/blob/3.5.3/papermerge/core/features/shared_nodes/router.py#L78-L150 technical-description
https://github.com/papermerge/papermerge-core/commit/0fd469102b05b5ebeb5ee39b3f73ff76991ab269 patch
VulnCheck Advisory: Papermerge Core through 3.5.3 Missing Authorization in Shared Nodes API third-party-advisory