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    CVE-2026-23989

    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.

    Published:Feb 6, 2026
    Last Modified:Apr 17, 2026
    EPS:Feb 6, 2026
    EPSS Score:0.00017
    CVSS Score:8.2

    Affected Products

    Vendor
    Heinlein
    Product
    Opencloud Reva
    Vendor
    Opencloud-eu
    Product
    Reva

    Exploits

    https://github.com/dinosn/cve-2026-23989-opencloud-lab

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High