CVE-2026-111620

O2OA through 10.0.2-ce contains an authorization bypass vulnerability in x_processplatform_assemble_surface that allows authenticated users to download attachments from other works. ActionDownloadWithWork and ActionDownloadWithWorkStream never verify that the requested attachment id belongs to the referenced work or draft, so any visitable work or owned draft can be supplied. Attackers who know an attachment UUID can request it through jaxrs/attachment/download/{id}/work/{workId} to read documents attached to other users' processes.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.6 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/o2oa/o2oa
https://github.com/o2oa/o2oa/blob/10.0.2-ce/o2server/x_processplatform_assemble_surface/src/main/java/com/x/processplatform/assemble/surface/jaxrs/attachment/ActionDownloadWithWork.java#L44-L95
https://github.com/o2oa/o2oa/blob/10.0.2-ce/o2server/x_processplatform_assemble_surface/src/main/java/com/x/processplatform/assemble/surface/jaxrs/attachment/ActionDownloadWithWorkStream.java#L45-L64
https://hackmd.io/@hieuPenguinnn/o2oa-processplatform-attachment-download-work-cross-work-idor
https://www.vulncheck.com/advisories/o2oa-through-10.0.2-ce-cross-work-attachment-read-via-attachment-download-endpoint
https://hackmd.io/@hieuPenguinnn/o2oa-processplatform-attachment-download-work-cross-work-idor

Configurations

No configuration.

History

19 Oct 2026, 13:16

Type	Values Removed	Values Added
References	~~() https://hackmd.io/@hieuPenguinnn/o2oa-processplatform-attachment-download-work-cross-work-idor -~~	() https://hackmd.io/@hieuPenguinnn/o2oa-processplatform-attachment-download-work-cross-work-idor -

16 Oct 2026, 18:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-16 18:17

Updated : 2026-10-19 13:16

NVD link : CVE-2026-111620

Mitre link : CVE-2026-111620

CVE.ORG link : CVE-2026-111620

JSON object : View

Products Affected

No product.

CWE

CWE-639

Authorization Bypass Through User-Controlled Key

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