CVE-2026-23989— REVA Public Link Exploit
Quick assessment
Affected
opencloud-eu reva
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.
REVA是OpenCloud开源的一个数据平台软件。 REVA 2.42.3之前版本和2.40.3之前版本存在安全漏洞，该漏洞源于GRPC授权中间件存在范围验证绕过，可能导致创建包含所有可访问资源的存档。
In-the-Wild Activity Observed
github_trending · low
Possible ATT&CK Techniques 1 AI
T1530 · Data from Cloud Storage
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I. Basic Information for CVE-2026-23989
Vulnerability Information
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Vulnerability Title
REVA Public Link Exploit
Source: CVE Program / CVE List V5
Vulnerability Description
REVA is an interoperability platform. Prior to 2.42.3 and 2.40.3, a bug in the GRPC authorization middleware of the "Reva" component of OpenCloud allows a malicious user to bypass the scope verification of a public link. By exploiting this via the the "archiver" service this can be leveraged to create an archive (zip or tar-file) containing all resources that this creator of the public link has access to. This vulnerability is fixed in 2.42.3 and 2.40.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
REVA 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
REVA是OpenCloud开源的一个数据平台软件。 REVA 2.42.3之前版本和2.40.3之前版本存在安全漏洞，该漏洞源于GRPC授权中间件存在范围验证绕过，可能导致创建包含所有可访问资源的存档。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| opencloud-eu | reva | < 2.40.3 | - |
|
II. Public POCs for CVE-2026-23989
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same product: reva