# CVE-2026-109203: LogicalDOC Community Edition missing authorization in ConvertPdf servlet

Source: https://junglewise.ai/threats/cve-2026-109203-logicaldoc-community-edition-through-9-3-contains-a-missing  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-12. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-109203 · Severity: medium · CVSS 6.5 · Published 2026-10-12

LogicalDOC Community Edition is an open-source document management system that stores and controls access to files. A flaw in the ConvertPdf component fails to verify that authenticated users have permission to access specific documents, allowing them to download restricted PDFs by guessing document identifiers and requesting different versions. An attacker with valid login credentials can bypass access controls to view confidential documents they should not be able to retrieve.

Technologies: [LogicalDOC Community Edition](https://junglewise.ai/threats/technologies/logicaldoc-community-edition). Vendors: [LogicalDOC](https://junglewise.ai/threats/vendors/logicaldoc).

## Quick answers

**Is CVE-2026-109203 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-109203 being exploited in the wild.

**How severe is CVE-2026-109203?** Medium severity, with a CVSS score of 6.5, published 12 October 2026.

**Which products and versions are affected?** LogicalDOC Community Edition through 9.3.

**Is there a fix for CVE-2026-109203?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-109203 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-109203?** Check whether you run LogicalDOC Community Edition at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The ConvertPdf servlet performs session validation but lacks authorization checks to verify the user has access rights to the requested document. By enumerating sequential docId parameter values and manipulating the version parameter, an authenticated attacker can retrieve any PDF and its versions regardless of folder permissions. The vulnerability exists because the servlet fetches and downloads documents based on docId without consulting the security model that defines per-document access controls.

## Affected products

- LogicalDOC Community Edition through 9.3

## Timeline

- 2026-10-12: disclosed

## References

- [https://github.com/logicaldoc/community](https://github.com/logicaldoc/community)
- [https://github.com/logicaldoc/community/blob/9.3/logicaldoc-webapp/src/main/java/com/logicaldoc/web/ConvertPdf.java](https://github.com/logicaldoc/community/blob/9.3/logicaldoc-webapp/src/main/java/com/logicaldoc/web/ConvertPdf.java)

## Related threats

- [LogicalDOC Community Edition username enumeration in AvatarServlet](https://junglewise.ai/threats/cve-2026-109206-logicaldoc-community-edition-through-9-3-contains-a-username)
- [LogicalDOC Community Edition unauthenticated file upload in UploadServlet](https://junglewise.ai/threats/cve-2026-109205-logicaldoc-community-edition-through-9-3-contains-an)
- [LogicalDOC Community Edition improper authorization in password recovery](https://junglewise.ai/threats/cve-2026-109204-logicaldoc-community-edition-through-9-3-contains-an-improper)
- [LogicalDOC Community missing authorization in zip-export servlet](https://junglewise.ai/threats/cve-2026-109202-logicaldoc-community-edition-through-9-3-contains-a-missing)
- [LogicalDOC Community Edition missing authorization in SOAP document operations](https://junglewise.ai/threats/cve-2026-109201-logicaldoc-community-edition-through-9-3-contains-a-missing)