CVE-2026-110623: Papermerge Core through 3.5.3 Missing Authorization in Shared Nodes API
Advisory generated from the CVE record, CISA, Exploit Observer and VEDAS: what it is, whether it is exploited, who is affected, and how to fix and detect it.
Generated by VEDAS. Scores as of 2026-11-08 00:03 UTC. Rebuilt every few hours from cve-scores, CISA KEV and vedas-signatures. How this works and its limits.
What it is
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.
Description quoted from the CVE record (assigned by VulnCheck, published 2026-10-14).
Weakness: Missing Authorization
How it can be exploited
Exploitable over the network with low attack complexity only when specific conditions are present needing low privileges and no user interaction. Impact: confidentiality high, integrity high, availability high. CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA assessment (SSVC): CISA has no evidence of exploitation. Automatable: no. Technical impact: total.
Public exploit evidence (Exploit Observer)
Exploit Observer found 3 code repositories naming this CVE.
Code repositories that name a CVE are often scanners, copies or fakes, and some are malware. Read the code before running anything.
See all 6 references on Exploit Observer
Live scores
- EPSS
- 0.005
low predicted chance of attack - VEDAS
- 0.985
strong exploit evidence - On CISA KEV
- Not listed
- Detection rule
- Suricata
Who is affected
| Product | Affected | Not affected |
|---|---|---|
| papermerge papermerge-core | up to and including 3.5.3 | Not stated |
Version ranges exactly as the CVE record states them. “Before X” means X is the first fixed version.
How to fix it
Vendor guidance:
- https://github.com/papermerge/papermerge-core/commit/0fd469102b05b5ebeb5ee39b3f73ff76991ab269 (patch)
How to detect it
Suricata rules (network detection)
1 rule that alert on traffic matching this exploit: VEDAS CVE-2026-110623 Papermerge Core - Missing Authorization Arbitrary Node Sharing. Add them to your Suricata rule set and reload.
Show the rules
alert http $EXTERNAL_NET any -> $HTTP_SERVERS $HTTP_PORTS (msg:"VEDAS CVE-2026-110623 Papermerge Core - Missing Authorization Arbitrary Node Sharing"; flow:established,to_server; http.method; pcre:"/^(POST|PATCH)$/"; http.uri; content:"/shared-nodes"; nocase; fast_pattern; classtype:web-application-attack; reference:cve,CVE-2026-110623; reference:url,https://www.exploit.observer/?keyword=CVE-2026-110623&match=exact; reference:url,https://subdomain.center/?engine=ammonites&keyword=papermerge&match=exact; sid:1084801; rev:1;)
CVE-2026-110623.rules on GitHub
References
Vendor advisories and patches
- https://github.com/papermerge/papermerge-core/commit/0fd469102b05b5ebeb5ee39b3f73ff76991ab269 (patch)
Technical analysis and advisories
- 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)
- VulnCheck Advisory: Papermerge Core through 3.5.3 Missing Authorization in Shared Nodes API (third-party-advisory)
Other databases
Where this comes from
This advisory is generated automatically by VEDAS from: CVE.org record, cve-scores (EPSS and VEDAS), Exploit Observer, vedas-signatures. Text in quotes is reproduced from the source; everything else is a fixed template filled with source fields. Nothing here is written by a language model. Check the vendor advisory before acting, and read how VEDAS and Exploit Observer work, and their limits.
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