CVE-2026-78381— Post screen 字段路径遍历导致任意文件读取漏洞
一分钟漏洞结论
影响对象
ransomlook ransomlook
利用判断
存在公开或 AI PoC，应优先验证
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。
RansomLook 在处理与群组帖子（group posts）关联的 字段时存在路径遍历漏洞。 API 处理器将数据库控制的 值与应用程序的 目录直接拼接，并在未验证解析后的文件是否仍位于预期目录内的情况下直接打开该路径。 由于 字段是自由格式的，既可以通过管理后台的帖子编辑器进行填写，也可以从远程 RansomLook 实例导入的数据中填充，因此恶意的上游实例可以注入诸如 等路径遍历序列。当受影响的帖子随后通过 API 被检索时，RansomLook 会解析并读取攻击者控制的路径，并将所引用文件的内容以 Bas
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一、 漏洞 CVE-2026-78381 基础信息
漏洞信息
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Vulnerability Title
RansomLook Arbitrary File Read via Path Traversal in Post screen Field
来源: CVE Program / CVE List V5
Vulnerability Description
RansomLook contains a path traversal vulnerability in the handling of the screen field associated with group posts. The GroupPost.get API handler concatenates the database-controlled screen value directly with the application's source/ directory and opens the resulting path without verifying that the resolved file remains within the intended directory.
Because the screen field is free-form and can be populated either through the administrative post editor or through data imported from a remote RansomLook instance, a malicious upstream instance can provide traversal sequences such as ../config/generic.json. When the affected post is subsequently retrieved through the API, RansomLook resolves and reads the attacker-controlled path and returns the contents of the referenced file Base64-encoded in the API response.
This can allow an attacker (being admin) controlling imported post data to read arbitrary files accessible to the RansomLook process, potentially exposing sensitive configuration data, API credentials, password hashes, or other application secrets. The attack does not require the malicious upstream to possess an account on the affected RansomLook instance.
The vulnerability is addressed by resolving screen paths with os.path.realpath() and verifying that the resolved path remains beneath the application's source/ directory. Validation is performed both when values are written and immediately before files are read. Using canonical paths also prevents traversal through symbolic links that would bypass purely lexical path normalization checks.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N
来源: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| ransomlook | ransomlook | 0 ~ 2.0.0 | - |
|
二、漏洞 CVE-2026-78381 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
AI 生成 POC
高级
Qwen3.6-35B-A3B
· 6417 chars
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三、漏洞 CVE-2026-78381 的情报信息
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CVE-2026-78381 补丁与修复 (1)
同批安全公告 · ransomlook · 2026-08-24 · 共 13 条
| CVE-2026-78387 | 9.4 CRITICAL | RansomLook Web配置编辑器缺少授权允许配置修改 |
| CVE-2026-78555 | 9.4 CRITICAL | RansomLook API密钥泄露漏洞 |
| CVE-2026-78372 | 9.2 CRITICAL | RansomLook 缺少授权导致隐私数据泄露 |
| CVE-2026-78370 | 9.2 CRITICAL | RansomLook 未授权数据库导出泄露私 |
| CVE-2026-78369 | 8.8 HIGH | RansomLook 缺少认证导致可未经授权创建加密组 |
| CVE-2026-78391 | 8.8 HIGH | RansomLook 存储型跨站脚本漏洞 |
| CVE-2026-78551 | 8.8 HIGH | RansomLook 登录接口存在用户名枚举及暴力破解漏洞 |
| CVE-2026-78380 | 8.7 HIGH | RansomLook 私域群组和市场帖泄露漏洞 |
| CVE-2026-78386 | 8.7 HIGH | RansomLook API未授权泄露抓取凭证并绕过配置漏洞 |
| CVE-2026-78385 | 8.2 HIGH | RansomLook PDF生成服务存在SSRF和本地文件读取漏洞 |
| CVE-2026-78553 | 7.0 HIGH | RansomLook Flask密钥权限漏洞允许本地管理员会话伪造 |
| CVE-2026-78378 | 6.9 MEDIUM | Ransomlook 未授权私有数据枚举漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-78381
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