CVE-2026-32951

Discourse: Authorization bypass in oneboxer via user-controlled category id

State: Published
Severity: 4.3 Medium
Published: Mar 31, 2026
Updated: Apr 1, 2026
Reserved: Mar 17, 2026

Description

Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authenticated user can obtain shared draft topic titles by sending an inline onebox request with a category_id parameter matching the shared drafts category. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	GitHub_M

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Affected Products

Product	Versions
discoursediscourse	>= 2026.1.0-latest, < 2026.1.3Affected >= 2026.2.0-latest, < 2026.2.2Affected >= 2026.3.0-latest, < 2026.3.0Affected

References

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