GHSA-FPVF-FVP5-996R
Vulnerability from github – Published: 2026-03-11 00:24 – Updated: 2026-03-11 05:47
VLAI?
Summary
Umbraco Backoffice API Allows Unauthorized Modification of Domain Data
Details
Description
A broken object-level authorization vulnerability exists in a backoffice API endpoint that allows authenticated users to assign domain-related data to content nodes without proper authorization checks.
The issue is caused by insufficient authorization enforcement on the affected API endpoint, whereby via an API call, domains can be set on content nodes that the editor does not have permission to access (either via user group privileges or start nodes).
Impact
An attacker can modify domain configurations for content nodes they are not permitted to edit. This may result in malicious or unintended routing behaviour, service disruption, and potential disclosure of configuration-related information.
Patches
The issue is patched in 16.5.1 and 17.2.2.
Workarounds
There is no workaround other than upgrading.
Severity ?
5.4 (Medium)
{
"affected": [
{
"package": {
"ecosystem": "NuGet",
"name": "Umbraco.Cms"
},
"ranges": [
{
"events": [
{
"introduced": "14.0.0"
},
{
"fixed": "16.5.1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "NuGet",
"name": "Umbraco.Cms"
},
"ranges": [
{
"events": [
{
"introduced": "17.0.0"
},
{
"fixed": "17.2.2"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-31832"
],
"database_specific": {
"cwe_ids": [
"CWE-639"
],
"github_reviewed": true,
"github_reviewed_at": "2026-03-11T00:24:53Z",
"nvd_published_at": "2026-03-10T22:16:21Z",
"severity": "MODERATE"
},
"details": "### Description\nA broken object-level authorization vulnerability exists in a backoffice API endpoint that allows authenticated users to assign domain-related data to content nodes without proper authorization checks.\n\nThe issue is caused by insufficient authorization enforcement on the affected API endpoint, whereby via an API call, domains can be set on content nodes that the editor does not have permission to access (either via user group privileges or start nodes).\n\n### Impact\nAn attacker can modify domain configurations for content nodes they are not permitted to edit. This may result in malicious or unintended routing behaviour, service disruption, and potential disclosure of configuration-related information.\n\n### Patches\nThe issue is patched in 16.5.1 and 17.2.2.\n\n### Workarounds\nThere is no workaround other than upgrading.",
"id": "GHSA-fpvf-fvp5-996r",
"modified": "2026-03-11T05:47:21Z",
"published": "2026-03-11T00:24:53Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-fpvf-fvp5-996r"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31832"
},
{
"type": "PACKAGE",
"url": "https://github.com/umbraco/Umbraco-CMS"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L",
"type": "CVSS_V3"
}
],
"summary": "Umbraco Backoffice API Allows Unauthorized Modification of Domain Data"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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