CVE-2026-91133
Discourse: Escape LIKE metacharacters in upload paths to prevent disclosure
- State
- Published
- Severity
- 6.5 Medium
- Published
- Sep 24, 2026
- Updated
- Sep 24, 2026
- Reserved
- Sep 14, 2026
Description
Discourse is an open-source discussion platform. Prior to 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0, authenticated users could supply unescaped SQL LIKE metacharacters to upload-resolution patterns, causing wildcard input to select unrelated upload records instead of matching a literal identifier. The affected upload metadata, URL-lookup, and cooked-video-placeholder paths could resolve uploads the user was not authorized to access. This allowed disclosure of restricted metadata, including original filenames and secure-upload paths, without modifying the upload records. This issue is fixed in versions 2026.1.8, 2026.6.3, 2026.7.2, and 2026.8.0.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | GitHub_M |
Weaknesses
- CWE-943 Improper Neutralization of Special Elements in Data Query Logic
Affected Products
| Product | Versions |
|---|---|
discoursediscourse |
|
References
- https://github.com/discourse/discourse/security/advisories/GHSA-8hxh-573g-52gx
- https://github.com/discourse/discourse/pull/42882
- https://github.com/discourse/discourse/commit/113c34d433d564bc69642649d501251a7e820b52
- https://github.com/discourse/discourse/commit/20c48bef712ee3edd4f7af58ca1123cb0c16ef6f
- https://github.com/discourse/discourse/commit/a04cab107a9f57939456181c4b082d0a34ec39bd
- https://github.com/discourse/discourse/commit/cb3ca8420fcc7aba334effd011cf41943a336fa6
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