CVE-2026-126071— Active Storage 代理模式流式传输拒绝服务漏洞
一分钟漏洞结论
影响对象
rails rails
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
Active Storage 简化了将文件上传至云服务、引用这些文件并将其附加到 Active Record 对象的操作。在 8.0 至 8.0.5.2 以及 8.1.4.1 版本中，当 Active Storage 通过其代理控制器提供文件时， 方法会在存储服务返回错误时调用 以发送 404 或 500 响应。如果该错误发生在首个数据块写入之后，响应已被提交，此时 会替换响应体，而服务器仍在读取原始的 缓冲区。由于该缓冲区从未被关闭，处理该请求的服务器线程将阻塞，直到进程重启。重复的下载失败可能耗尽服务器的线程资
可能的 ATT&CK 技术 1 AI
T1499 · Endpoint Denial of Service
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一、 漏洞 CVE-2026-126071 基础信息
漏洞信息
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Vulnerability Title
Active Storage: Possible DoS vulnerability in Active Storage proxy mode via storage errors during streaming
来源: CVE Program / CVE List V5
Vulnerability Description
Active Storage makes it simple to upload and reference files in cloud services and attach those files to Active Record objects. From 8.0 until 8.0.5.2 and 8.1.4.1, when Active Storage serves a file through its proxy controllers, ActiveStorage::Streaming#send_blob_stream handles an error from the storage service by calling head to send a 404 or 500 response. If the error occurs after the first chunk has been written, the response is already committed, and head replaces the response body while the server is still reading the original ActionController::Live buffer. That buffer is never closed, so the server thread handling the request blocks until the process restarts. Repeated failed downloads could exhaust the server's threads, possibly resulting in a DoS vulnerability. Applications are affected when they store files on a service that streams a download in several requests, such as Amazon S3, an S3-compatible service or Google Cloud Storage, and draw Active Storage's default routes. The proxy routes are drawn whether or not proxy mode is the default for the application. A file deleted while it is being served, or any other storage error partway through a download, triggers the condition. This issue is fixed in versions 8.1.4.1 and 8.0.5.2.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
对已超过有效生命周期的资源丧失索引
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-126071 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
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CVE-2026-126071 厂商页面 (1)
CVE-2026-126071 其他参考 (3)
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https://github.com/rails/rails/security/advisories/GHSA-4v2w-w6g6-f8f8 x_refsource_CONFIRM
同批安全公告 · rails · 2026-11-10 · 共 20 条
| CVE-2026-126082 | 9.8 CRITICAL | Active Storage 任意文件读写漏洞 |
| CVE-2026-126186 | 8.8 HIGH | Active Storage 远程代码执行及文件读取漏洞 |
| CVE-2026-126081 | 7.5 HIGH | Action Pack 强参数绕过漏洞 |
| CVE-2026-126080 | 7.5 HIGH | Active Support safe_constantize 拒绝服务漏洞 |
| CVE-2026-126077 | 6.8 MEDIUM | Action Pack Active Storage 代理模式敏感会话信息泄露 |
| CVE-2026-126079 | 6.1 MEDIUM | Action View 文本助手跨站脚本漏洞 |
| CVE-2026-126078 | 6.1 MEDIUM | Action View 高亮辅助跨站脚本漏洞 |
| CVE-2026-126070 | 6.1 MEDIUM | Action View strip_tags 跨站脚本漏洞 |
| CVE-2026-126072 | 5.9 MEDIUM | Action Pack 直播流拒绝服务漏洞 |
| CVE-2026-126085 | 5.3 MEDIUM | Active Storage 直接上传 Google Cloud 时绕过文件大小限制 |
| CVE-2026-126073 | 4.8 MEDIUM | Action Pack 内容协商缓存投毒漏洞 |
| CVE-2026-126075 | 4.7 MEDIUM | Active Support MessagePack 反序列化跨站脚本漏洞 |
| CVE-2026-126084 | 4.7 MEDIUM | Active Storage GCS 直接上传缓存控制未签名漏洞 |
| CVE-2026-126069 | 4.7 MEDIUM | Action View 标签辅助功能跨站脚本漏洞 |
| CVE-2026-126074 | 4.3 MEDIUM | Active Storage 文件名处理拒绝服务漏洞 |
| CVE-2026-126076 | 4.2 MEDIUM | Action Pack 会话恢复漏洞 |
| CVE-2026-126068 | 3.7 LOW | Action Mailbox Mailgun 入口签名重放漏洞 |
| CVE-2026-126067 | 3.1 LOW | Action Pack 会话 Cookie 缺失 SameSite 属性漏洞 |
| CVE-2026-126083 | Action Pack 远程 IP 伪造漏洞 |