{"answers":{"affected":"4 open source packages ship an affected version, including Umbraco.Cms. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-31832 in the wild and no public exploit code.","fix":"Upgrade Umbraco.Cms to a fixed version for your release line: 16.5.1 or 17.2.2.","what":"CVE-2026-31832 is a medium-severity missing authorization vulnerability in Umbraco Umbraco Cms, published on 10 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-31832 and fix it if it is affected.\n\nWhat it is: CVE-2026-31832 is a medium-severity missing authorization vulnerability in Umbraco Umbraco Cms, published on 10 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-31832 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- Umbraco.Cms (NuGet): affected from 14.0.0; fixed in 16.5.1\n- Umbraco.Cms (NuGet): affected from 14.0.0; fixed in 16.5.1\n- Umbraco.Cms (NuGet): affected from 17.0.0; fixed in 17.2.2\n- Umbraco.Cms (NuGet): affected from 17.0.0; fixed in 17.2.2\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-31832/ (Markdown: https://insights.sbomify.com/CVE-2026-31832/index.md)","id":"CVE-2026-31832","markdown":"https://insights.sbomify.com/CVE-2026-31832/index.md","name":"CVE-2026-31832","record":{"aliases":["GHSA-fpvf-fvp5-996r"],"analysis":{"component_type":"web_application","fix_type":"patch","impacts":["data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Umbraco CMS","requires_auth":"low_privilege","summary":"Authenticated users can modify domain data on unauthorized content nodes due to missing authorization checks in the Umbraco backoffice API.","user_interaction":"not_required","vuln_class":"missing_authorization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"umbraco_cms","vendor":"umbraco"}],"cvss":{"score":5.4,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","version":"3.1"},"cwes":[{"id":"CWE-639","name":"Authorization Bypass Through User-Controlled Key"}],"description":"Umbraco is an ASP.NET CMS. From 14.0.0 to before 16.5.1 and 17.2.2, 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). This vulnerability is fixed in 16.5.1 and 17.2.2.","ecosystems":["NuGet"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Umbraco Backoffice API Allows Unauthorized Modification of Domain Data","id":"CVE-2026-31832","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"NuGet","product":"umbraco:umbraco_cms","products":["umbraco:umbraco_cms"],"type":"missing_authorization","year":"2026"},"n_packages":4,"n_references":1,"next":{"headline":"Umbraco has Stored XSS in UFM Rendering Pipeline via Permissive DOMPurify Attribute Filtering","id":"CVE-2026-31833"},"packages":[{"ecosystem":"NuGet","fixed":["16.5.1"],"introduced":["14.0.0"],"last_affected":[],"package":"Umbraco.Cms","purl":null,"source":"GHSA-fpvf-fvp5-996r"},{"ecosystem":"NuGet","fixed":["16.5.1"],"introduced":["14.0.0"],"last_affected":[],"package":"Umbraco.Cms","purl":"pkg:nuget/Umbraco.Cms","source":"GHSA-fpvf-fvp5-996r"},{"ecosystem":"NuGet","fixed":["17.2.2"],"introduced":["17.0.0"],"last_affected":[],"package":"Umbraco.Cms","purl":null,"source":"GHSA-fpvf-fvp5-996r"},{"ecosystem":"NuGet","fixed":["17.2.2"],"introduced":["17.0.0"],"last_affected":[],"package":"Umbraco.Cms","purl":"pkg:nuget/Umbraco.Cms","source":"GHSA-fpvf-fvp5-996r"}],"prev":{"headline":"Tautulli: Unauthenticated Path Traversal in `/newsletter/image/images` endpoint","id":"CVE-2026-31831"},"products":["Umbraco-CMS"],"published":"2026-03-10","related":[{"cvss_score":10,"headline":"Umbraco CMS has an arbitrary file upload vulnerability","id":"CVE-2025-67288","kev_date_added":null,"published":"2025-12-22"},{"cvss_score":9.8,"headline":"File upload in n/a","id":"CVE-2014-10074","kev_date_added":null,"published":"2018-08-27"},{"cvss_score":9.8,"headline":"Server-side request forgery in n/a","id":"CVE-2012-1301","kev_date_added":null,"published":"2017-04-13"},{"cvss_score":9.3,"headline":"Umbraco CMS \u003c 4.7.1 codeEditorSave.asmx RCE","id":"CVE-2012-10054","kev_date_added":null,"published":"2025-08-13"},{"cvss_score":8.8,"headline":"Umbraco has a Management API Vulnerability to Path Traversal With Authenticated Users","id":"CVE-2025-32017","kev_date_added":null,"published":"2025-04-08"},{"cvss_score":8.8,"headline":"Umbraco CMS Authenticated File Upload","id":"CVE-2020-9471","kev_date_added":null,"published":"2020-03-16"},{"cvss_score":8.6,"headline":"Umbraco Remote ApplicationURL Overwrite","id":"CVE-2022-22690","kev_date_added":null,"published":"2022-01-18"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-03-11","vendors":["umbraco"]},"summary":"Authenticated users can modify domain data on unauthorized content nodes due to missing authorization checks in the Umbraco backoffice API.","url":"https://insights.sbomify.com/CVE-2026-31832/"}