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CVE-2025-21604— LangChain4j-AIDeepin Using MD5 to Hash files may cause file upload conflicts

Quick assessment

Affected
moyangzhan langchain4j-aideepin
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LangChain4j-AIDeepin是moyangzhan个人开发者的一个基于 AI 的工作效率提升工具。可用于辅助企业/团队进行技术研发、产品设计、人事/财务/IT信息咨询、系统/商品咨询、客服话术支撑等工作。 LangChain4j-AIDeepin 3.5.0之前版本存在安全漏洞，该漏洞源于使用MD5对文件进行哈希处理，可能会导致文件上传冲突。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.26% · P18

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2025-21604

Vulnerability Information
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Vulnerability Title
LangChain4j-AIDeepin Using MD5 to Hash files may cause file upload conflicts
Source: CVE Program / CVE List V5
Vulnerability Description
LangChain4j-AIDeepin is a Retrieval enhancement generation (RAG) project. Prior to 3.5.0, LangChain4j-AIDeepin uses MD5 to hash files, which may cause file upload conflicts. This issue is fixed in 3.5.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
可逆的单向哈希
Source: CVE Program / CVE List V5
Vulnerability Title
LangChain4j-AIDeepin 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LangChain4j-AIDeepin是moyangzhan个人开发者的一个基于 AI 的工作效率提升工具。可用于辅助企业/团队进行技术研发、产品设计、人事/财务/IT信息咨询、系统/商品咨询、客服话术支撑等工作。 LangChain4j-AIDeepin 3.5.0之前版本存在安全漏洞，该漏洞源于使用MD5对文件进行哈希处理，可能会导致文件上传冲突。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
moyangzhan langchain4j-aideepin < 3.5.0 -

II. Public POCs for CVE-2025-21604

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2025-21604

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Patches & Fixes for CVE-2025-21604 (1)

Vendor Advisories for CVE-2025-21604 (1)

IV. Related Vulnerabilities

Same weakness: CWE-328

V. Comments for CVE-2025-21604

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