CVE-2026-23989
High
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.
SeverityHigh
CVSS8.2
Exploit probability23. percentile0.3%
ProductHeinlein Opencloud Reva
PublishedFeb 6, 2026
First seenFeb 6, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- heinlein opencloud_reva2.40.3, 2.42.3 or later
- github.com/opencloud-eu/reva/v22.40.3, 2.42.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| heinlein opencloud_reva | v < 2.40.3, 2.41.0 ≤ v < 2.42.3 | 2.40.3, 2.42.3 |
| github.com/opencloud-eu/reva/v2Go | v < 2.40.3, 2.41.0 ≤ v < 2.42.3 | 2.40.3, 2.42.3 |
| github.com/opencloud-eu/revaGo | No range specified | — |
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