opencloud-eu reva up to 2.40.2/2.42.2 GRPC Authorization Middleware authorization

CVSS Meta Temp Score
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CTI Interest Score
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7.8$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in opencloud-eu reva up to 2.40.2/2.42.2. This vulnerability affects unknown code of the component GRPC Authorization Middleware. Executing a manipulation can lead to authorization. This vulnerability is registered as CVE-2026-23989. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in opencloud-eu reva up to 2.40.2/2.42.2. This vulnerability affects some unknown functionality of the component GRPC Authorization Middleware. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-863. The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-23989 since 01/19/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available.

Upgrading to version 2.40.3 or 2.42.3 eliminates this vulnerability. Applying the patch 95aa2bc5d980eaf6cc134d75782b4f5ac7b36ae1 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.8

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔒

CNA Base Score: 8.2
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Authorization
CWE: CWE-863 / CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: reva 2.40.3/2.42.3
Patch: 95aa2bc5d980eaf6cc134d75782b4f5ac7b36ae1

Timelineinfo

01/19/2026 CVE reserved
02/06/2026 +18 days Advisory disclosed
02/06/2026 +0 days VulDB entry created
02/26/2026 +20 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-9j2f-3rj3-wgpg
Status: Confirmed

CVE: CVE-2026-23989 (🔒)
GCVE (CVE): GCVE-0-2026-23989
GCVE (VulDB): GCVE-100-344710

Entryinfo

Created: 02/06/2026 21:16
Updated: 02/26/2026 13:28
Changes: 02/06/2026 21:16 (67), 02/26/2026 13:28 (11)
Complete: 🔍
Cache ID: 216::103

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