High 7.5Published Oct 14, 2026

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

Updated under an hour ago (Oct 27, 2026, 1:10 AM ET)

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It affects papermerge-core. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.50%, higher than 42% of scored CVEs.

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Every CVE for papermerge-core

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.50% (percentile 42)
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

papermerge papermerge-core papermerge:core (from the name)	through 3.5.3	CNA record

References

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
https://www.vulncheck.com/advisories/papermerge-core-through-3.5.3-missing-authorization-in-shared-nodes-api	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.