ApostropheCMS: Host header controls server-side image fetch origin in @apostrophecms/ai-helper, enabling authenticated SSRF

影響: npm:@apostrophecms/ai-helper >= 1.0.0-beta.10, < 1.0.0-beta.13 → 1.0.0-beta.13

The @apostrophecms/ai-helper package builds the URL for a server-side image fetch by resolving a storage-relative path against req.baseUrl. When the site does not set a global base URL (the default), req.baseUrl is derived from the incoming HTTP Host header. An authenticated editor can generate a base64 AI image (which is persisted without a stored url) and then send an unauthorized PATCH accept request with an attacker-chosen Host header. The server then issues an outbound GET to the a…

在 GitHub Advisory Database 阅读

2026/10/21 03:11，GitHub Advisory Database 发布了“ApostropheCMS: Host header controls server-side image fetch origin in @apostrophecms/ai-helper, enabling authenticated SSRF”（类型：漏洞公告）。严重程度为“中危”（medium）。相关技术：JavaScript / Node.js。CVE：CVE-2026-113671。