CVE-2026-26265
- Source
- https://cve.org/CVERecord?id=CVE-2026-26265
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-26265.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-26265
- Aliases
-
- BIT-discourse-2026-26265
- GHSA-crxf-p6jm-vpgw
- Published
- 2026-02-26T15:10:25.929Z
- Modified
- 2026-03-03T14:26:00.488352Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
- Summary
- Discourse has IDOR vulnerability in the directory items endpoint
- Details
-
Discourse is an open source discussion platform. Prior to versions 2025.12.2, 2026.1.1, and 2026.2.0, an IDOR vulnerability in the directory items endpoint allows any user, including anonymous users, to retrieve private user field values for all users in the directory. The
user_field_idsparameter inDirectoryItemsController#indexaccepts arbitrary user field IDs without authorization checks, bypassing the visibility restrictions (show_on_profile/show_on_user_card) that are enforced elsewhere (e.g.,UserCardSerializerviaGuardian#allowed_user_field_ids). An attacker can requestGET /directory_items.json?period=all&user_field_ids=<id>with any private field ID and receive that field's value for every user in the directory response. This enables bulk exfiltration of private user data such as phone numbers, addresses, or other sensitive custom fields that admins have explicitly configured as non-public. The issue is patched in versions 2025.12.2, 2026.1.1, and 2026.2.0 by filteringuser_field_idsagainstUserField.public_fieldsfor non-staff users before building the custom field map. As a workaround, site administrators can remove sensitive data from private user fields, or disable the user directory via theenable_user_directorysite setting. - Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26265.json", "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-863" ] }- References
Affected packages
Git / github.com/discourse/discourse
Affected ranges
- Type
- GIT
- Repo
- https://github.com/discourse/discourse
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
{ "versions": [ { "introduced": "0" }, { "fixed": "2025.12.2" } ] }