CVE-2026-111620CWE-639

CVE-2026-111620

Medium · published October 16, 2026

CVSS v3.1
5.3
EPSS
0%
Percentile
21.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
6.0 · CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00301 · 21.7th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-10-16T22:17Z
References (6)
https://github.com/o2oa/o2oa · [email protected]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 · [email protected]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 · [email protected]https://hackmd.io/@hieuPenguinnn/o2oa-processplatform-attachment-download-work-cross-work-idor · [email protected]https://www.vulncheck.com/advisories/o2oa-through-10.0.2-ce-cross-work-attachment-read-via-attachment-download-endpoint · [email protected]https://hackmd.io/@hieuPenguinnn/o2oa-processplatform-attachment-download-work-cross-work-idor · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 18 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 16 OCT 17:38Z
    O2OA through 10.0.2-ce Cross-Work Attachment Read via Attachment Download Endpoint
    cvelistv5
  • 16 OCT 17:38Z
    O2OA through 10.0.2-ce Cross-Work Attachment Read via Attachment Download Endpoint
    cvelistv5