CVE-2026-69197 Umbraco: Delivery API leaks protected (Public Access) content through Content Picker / Multi-Node Tree Picker expansion
Attackers can bypass Public Access restrictions to read protected content metadata and values via Content Picker expansion in Umbraco Delivery API.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-69197?
CVE-2026-69197 is a high-severity missing authorization vulnerability in Umbraco-CMS, published on 17 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Umbraco is an ASP.NET CMS. Prior to 13.15.1, 17.5.3, and 18.0.2, the Content Delivery API applies member and Public Access checks to the directly requested node but not to referenced nodes serialized through Content Picker or Multi-Node Tree Picker properties, including pickers nested in Block List, Block Grid, or Rich Text Editor blocks. When DeliveryApi:PublicAccess is enabled, an anonymous caller can retrieve a protected node's name, route, and id through an unprotected referencing node and use ?expand to retrieve full property values. When the Delivery API is instead gated by the organization-wide API key, a key holder can still bypass per-node Public Access through the same expansion path. The same RequestContextOutputExpansionStrategyV2 and ElementOnlyOutputExpansionStrategy path also bypasses allowed or disallowed content-type alias restrictions for referenced content. Direct requests for the protected node still return 401, and no integrity or availability impact is established. This issue is fixed in versions 13.15.1, 17.5.3, and 18.0.2.
Which versions are affected by CVE-2026-69197?
6 open source packages ship an affected version, including Umbraco.Cms.
| Package | Affected | Fixed in |
|---|---|---|
Umbraco.Cms NuGet | From 12.0.0 | 13.15.1 |
Umbraco.Cms NuGet | From 12.0.0 | 13.15.1 |
Umbraco.Cms NuGet | From 14.0.0-rc1 | 17.5.3 |
Umbraco.Cms NuGet | From 14.0.0-rc1 | 17.5.3 |
Umbraco.Cms NuGet | From 18.0.0 | 18.0.2 |
Umbraco.Cms NuGet | From 18.0.0 | 18.0.2 |
How do I fix CVE-2026-69197?
Upgrade Umbraco.Cms to a fixed version for your release line: 13.15.1, 17.5.3 or 18.0.2.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-69197 being exploited?
There is no known exploitation of CVE-2026-69197 in the wild and no public exploit code.
Sources
Also known as GHSA-wr57-hqmp-fgvh.