CVE-2026-91133

Discourse: Escape LIKE metacharacters in upload paths to prevent disclosure

Published: Sep 24, 2026Updated: Sep 24, 2026 Sources: CVE List NVDCWE-943

6.5MEDIUM

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:NIntegrity

None

A:NAvailability

None

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Weaknesses

CWE-943

Affected Products

discourse

commercial·USaka discourse.org

discourse

Web & CMS Plugins

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

References

https://github.com/discourse/discourse/security/advisories/GHSA-8hxh-573g-52gx

github.com

https://github.com/discourse/discourse/pull/42882

github.com

https://github.com/discourse/discourse/commit/113c34d433d564bc69642649d501251a7e820b52

github.com

and 3 more references View all →

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