/Vulnerability Library

Discourse - Private User Field Disclosure via Directory Items IDOR

CVE-2026-26265
Verified

Description

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.

Severity

High

CVSS Score

7.5

Exploit Probability

1%

Affected Product

discourse

Published Date

September 14, 2026

Template Author

str4k3r

CVE-2026-26265.yaml
7.5Score

CVSS Metrics

CVSS Vector:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVE ID:
cve-2026-26265
CWE ID:
cwe-639

References

https://github.com/discourse/discourse/security/advisories/GHSA-crxf-p6jm-vpgwhttps://nvd.nist.gov/vuln/detail/CVE-2026-26265

Remediation Steps

Update to versions 2025.12.2, 2026.1.1, or 2026.2.0 or later.