CVE-2026-27454
Discourse has check revision visibility on posts endpoint
描述
Discourse is an open-source discussion platform. Prior to versions 2026.3.0, 2026.2.1, and 2026.1.2, requesting /posts/:id.json?version=X bypassed authorization checks on post revisions. The display_post method called post.revert_to directly without verifying whether the revision was hidden or if the user had permission to view edit history. This meant hidden revisions (intentionally concealed by staff) could be read by any user by simply enumerating version numbers. Starting in versions 2026.3.0, 2026.2.1, and 2026.1.2, Discourse looks up the PostRevision and call guardian.ensure_can_see! before reverting, consistent with how the /posts/:id/revisions/:revision endpoint already authorizes access. No known workarounds are available.
如何修補 CVE-2026-27454
要修補 CVE-2026-27454,請將受影響套件升級到下列已修補版本。
- —升級至 2026.1.2 或更新版本
CVE-2026-27454 正在被利用嗎?
低 — EPSS 為 0.4%,目前沒有觀察到大規模利用活動。
受影響套件(1)
- >= 2026.1.0, < 2026.1.2, >= 2026.2.0, < 2026.2.1, >= 2026.3.0, < 2026.3.0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
參考連結(5)
- WEBgithub.com/discourse/discourse/commit/8510fde30eb0d7f2dee822a95f6cf43b9ac943d0
- WEBgithub.com/discourse/discourse/commit/c0eeb5892f5d61ad62b057f4d468333a6e9f28c3
- WEBgithub.com/discourse/discourse/commit/c474fbd79d2bd231baafb4332970297d781f92ca
- WEBgithub.com/discourse/discourse/security/advisories/GHSA-fq69-f929-wp96