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CVE-2026-111620— O2OA through 10.0.2-ce Cross-Work Attachment Read via Attachment Download Endpoint

Quick assessment

Affected
O2OA O2OA
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

O2OA 10.0.2-ce 及更早版本中的 组件存在授权绕过漏洞。该漏洞允许已认证用户下载其他流程任务的附件。由于 和 从未验证所请求的附件 ID 是否确实属于引用的流程任务或草稿，攻击者可以传入任何可访问的流程任务或自身拥有的草稿。若攻击者知晓某个附件的 UUID，即可通过 接口请求该附件，从而读取其他用户流程任务中附加的文档。

CVSS 5.3 · Medium EPSS 0.30% · P21

Affected Version Matrix 1

VendorProduct Version RangeStatus
O2OA O2OA ≤ 10.0.2-ce affected
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I. Basic Information for CVE-2026-111620

Vulnerability Information
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Vulnerability Title
O2OA through 10.0.2-ce Cross-Work Attachment Read via Attachment Download Endpoint
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
O2OA O2OA 0 ~ 10.0.2-ce -

II. Public POCs for CVE-2026-111620

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-111620

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Vendor Advisories for CVE-2026-111620 (1)

Vendor Pages for CVE-2026-111620 (3)

IV. Related Vulnerabilities

Same product: O2OA
Same weakness: CWE-639

V. Comments for CVE-2026-111620

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