Detections
Analytics

SCA: security update for Umbraco.Cms (GHSA-rhcg-3h8r-v6vp)

high Tenable Self-Hosted Container Security Plugin ID 438645

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Umbraco is an ASP.NET CMS. From 15.3.1 to before 16.5.1 and 17.2.2, A privilege escalation vulnerability
 has been identified in Umbraco CMS. Under certain conditions, authenticated backoffice users with
 permission to manage users, may be able to elevate their privileges due to insufficient authorization
 enforcement when modifying user group memberships. The affected functionality does not properly validate
 whether a user has sufficient privileges to assign highly privileged roles. This vulnerability is fixed in
 16.5.1 and 17.2.2. (CVE-2026-31834)

Solution

Update the Umbraco.Cms library and its related packages to version 16.5.1 or later.

See Also

https://github.com/advisories/GHSA-rhcg-3h8r-v6vp

Plugin Details

Severity: High

ID: 438645

Version: Revision 1.8

Type: Local

Family: SCA Checks

Published: 3/11/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.88

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 8.3

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:M/C:C/I:C/A:C

CVSS Score Source: CVE-2026-31834

CVSS v3

Risk Factor: High

Base Score: 7.2

Temporal Score: 6.3

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 3/11/2026

Vulnerability Publication Date: 3/10/2026

Reference Information

CVE: CVE-2026-31834

cwe: CWE-269