CVE-2026-27740
Discourse has Stored XSS in AI Triage Automation
描述
Discourse is an open-source discussion platform. Versions prior to 2026.3.0, 2026.2.1, and 2026.1.2 have a cross-site scripting vulnerability that arises because the system trusts the raw output from an AI Large Language Model (LLM) and renders it using htmlSafe in the Review Queue interface without adequate sanitization. A malicious attacker can use valid Prompt Injection techniques to force the AI to return a malicious payload (e.g., tags). When a Staff member (Admin/Moderator) views the flagged post in the Review Queue, the payload executes. Versions 2026.3.0, 2026.2.1, and 2026.1.2 contain a patch. As a workaround, temporarily disable AI triage automation scripts.
如何修補 CVE-2026-27740
要修補 CVE-2026-27740,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-2026-27740 正在被利用嗎?
低 — EPSS 為 0.3%,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 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
參考連結(5)
- WEBgithub.com/discourse/discourse/commit/44b84439df7e4424b2e7f216fd8fdd7dacff2227
- WEBgithub.com/discourse/discourse/commit/8ae7cb2414d6918d7fc45e1fda7ffbb32912a975
- WEBgithub.com/discourse/discourse/commit/ed70949f2c047196f33cfa94f2819df29c5d1e5f
- WEBgithub.com/discourse/discourse/security/advisories/GHSA-95hc-42c6-wvvr