CVE-2026-26265 Details.
Discourse - Private User Field Disclosure via Directory Items IDOR
Atlas does not check this one. Needs a scripted sequence.
This check is a series of requests where each step depends on the last, often after logging in. Atlas runs single, read-only probes, so it does not run this one.
About CVE-2026-26265. What It Means.
Discourse prior to 2025.12.2, 2026.1.1, and 2026.2.0 contains an IDOR vulnerability caused by lack of authorization checks on user_field_ids parameter in DirectoryItemsController#index, letting any user retrieve private user field values, exploit requires no authentication.
Affected Product. What Is Hit.
- Vendor
- discourse
- Product
- Discourse
FAQ
Common Questions.
Discourse - Private User Field Disclosure via Directory Items IDOR. Discourse prior to 2025.12.2, 2026.1.1, and 2026.2.0 contains an IDOR vulnerability caused by lack of authorization checks on user_field_ids parameter in DirectoryItemsController#index, letting any user retrieve private user field values, exploit requires no authentication.
No. This check is a series of requests where each step depends on the last, often after logging in. Atlas runs single, read-only probes, so it does not run this one. The facts about CVE-2026-26265 are on this page, and you can request a demo to see how Brandefense watches your whole external attack surface.
CVE-2026-26265 is not on the CISA Known Exploited Vulnerabilities list at the time of writing, but it is still worth fixing.
Update Discourse to the latest version from the vendor, or follow the vendor's advice to switch off the affected feature. Vendor links are listed on this page when they are known.
This page lists the public facts about CVE-2026-26265. Atlas does not run a check for it, so nothing here says whether a particular site is affected.