Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-78381— RansomLook Arbitrary File Read via Path Traversal in Post screen Field

Quick assessment

Affected
ransomlook ransomlook
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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

CVSS 8.2 · High
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-78381

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
RansomLook Arbitrary File Read via Path Traversal in Post screen Field
Source: 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.
Source: 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
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
ransomlook ransomlook 0 ~ 2.0.0 -

II. Public POCs for CVE-2026-78381

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9992 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-78381

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-78381 (1)

Same Patch Batch · ransomlook · 2026-08-24 · 13 CVEs total

CVE-2026-78387 9.4 CRITICAL RansomLook Missing Authorization in Web Configuration Editor Allows Application Configurat
CVE-2026-78555 9.4 CRITICAL RansomLook API Key Disclosure Through /admin/apikeys HTML Source
CVE-2026-78372 9.2 CRITICAL RansomLook Missing Authorization Allows Disclosure of Private Group and Ransom Note Data
CVE-2026-78370 9.2 CRITICAL RansomLook Unauthenticated Database Export Exposes Private Data
CVE-2026-78369 8.8 HIGH Missing Authentication Allows Unauthorized Creation of Crypto Groups in RansomLook
CVE-2026-78391 8.8 HIGH Stored Cross-Site Scripting via Untrusted Cryptocurrency Address Rendering in RansomLook
CVE-2026-78551 8.8 HIGH RansomLook Login Endpoint Allows Timing-Based Username Enumeration and Unthrottled Authent
CVE-2026-78380 8.7 HIGH Private Group and Market Posts Disclosed Through Public Notification Channels in RansomLoo
CVE-2026-78386 8.7 HIGH Unauthenticated Disclosure of Scraping Credentials and Bypass Configuration via RansomLook
CVE-2026-78385 8.2 HIGH RansomLook Analysis PDF Generation Allows Server-Side Request Forgery and Arbitrary Local
CVE-2026-78553 7.0 HIGH Insecure Flask Secret-Key File Permissions Allow Local Administrator Session Forgery in Ra
CVE-2026-78378 6.9 MEDIUM Redis Glob Pattern Injection Allows Unauthorized Enumeration of Private Ransomlook Data

IV. Related Vulnerabilities

Same product: ransomlook
Same vendor: ransomlook
Same weakness: CWE-22

V. Comments for CVE-2026-78381

No comments yet

Leave a comment