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CVE-2026-7847— chatchat-space Langchain-Chatchat Uploaded File openai_routes.py _get_file_id random values

Quick assessment

Affected
chatchat-space Langchain-Chatchat
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.

LangChain-Chatchat是Chatchat-Space开源的一个基于LangChain框架开发的聊天机器人软件。 LangChain-Chatchat 0.3.1.3及之前版本存在加密问题漏洞，该漏洞源于Uploaded File Handler组件中文件libs/chatchat-server/chatchat/server/api_server/openai_routes.py的函数_get_file_id导致随机值不足，可能导致攻击者在本地网络访问下利用该漏洞。

CVSS 2.6 · Low EPSS 0.29% · P20

Affected Version Matrix 4

VendorProduct Version RangeStatus
chatchat-space Langchain-Chatchat 0.3.1.0 affected
0.3.1.1 affected
0.3.1.2 affected
0.3.1.3 affected
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I. Basic Information for CVE-2026-7847

Vulnerability Information
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Vulnerability Title
chatchat-space Langchain-Chatchat Uploaded File openai_routes.py _get_file_id random values
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in chatchat-space Langchain-Chatchat up to 0.3.1.3. The affected element is the function _get_file_id of the file libs/chatchat-server/chatchat/server/api_server/openai_routes.py of the component Uploaded File Handler. Performing a manipulation results in insufficiently random values. Access to the local network is required for this attack. The attack's complexity is rated as high. The exploitability is described as difficult. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用不充分的随机数
Source: CVE Program / CVE List V5
Vulnerability Title
LangChain-Chatchat 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LangChain-Chatchat是Chatchat-Space开源的一个基于LangChain框架开发的聊天机器人软件。 LangChain-Chatchat 0.3.1.3及之前版本存在加密问题漏洞，该漏洞源于Uploaded File Handler组件中文件libs/chatchat-server/chatchat/server/api_server/openai_routes.py的函数_get_file_id导致随机值不足，可能导致攻击者在本地网络访问下利用该漏洞。
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
chatchat-space Langchain-Chatchat 0.3.1.0 -

II. Public POCs for CVE-2026-7847

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III. Intelligence Information for CVE-2026-7847

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Proof of Concept for CVE-2026-7847 (1)

Vendor Pages for CVE-2026-7847 (1)

Other References for CVE-2026-7847 (1)

Same Patch Batch · chatchat-space · 2026-05-05 · 4 CVEs total

CVE-2026-7844 6.3 MEDIUM chatchat-space Langchain-Chatchat Compatible File Service openai_routes.py delete_file mis
CVE-2026-7846 2.6 LOW chatchat-space Langchain-Chatchat OpenAI-Compatible File Upload API openai_routes.py files
CVE-2026-7845 2.6 LOW chatchat-space Langchain-Chatchat Vision Chat Paste Image dialogue.py PIL.Image.tobytes we

IV. Related Vulnerabilities

Same product: Langchain-Chatchat
Same vendor: chatchat-space
Same weakness: CWE-330

V. Comments for CVE-2026-7847

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