CVE-2026-111620 O2OA through 10.0.2-ce Cross-Work Attachment Read via Attachment Download Endpoint
Authenticated users can bypass authorization checks to download attachments from other users' processes by manipulating attachment IDs.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111620?
CVE-2026-111620 is a medium-severity missing authorization vulnerability in O2OA, published on 16 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-111620?
How do I fix CVE-2026-111620?
No fix has been published for CVE-2026-111620 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-111620 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-111620 exists.
Sources
Also known as GHSA-3hg3-468c-h77g.