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CVE-2026-7845— chatchat-space Langchain-Chatchat Vision Chat Paste Image dialogue.py PIL.Image.tobytes weak hash

CVSS 2.6 · Low EPSS 0.01% · P2
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I. Basic Information for CVE-2026-7845

Vulnerability Information
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Vulnerability Title
chatchat-space Langchain-Chatchat Vision Chat Paste Image dialogue.py PIL.Image.tobytes weak hash
Source: NVD (National Vulnerability Database)
Vulnerability Description
A flaw has been found in chatchat-space Langchain-Chatchat up to 0.3.1.3. This issue affects the function PIL.Image.tobytes of the file libs/chatchat-server/chatchat/webui_pages/dialogue/dialogue.py of the component Vision Chat Paste Image Handler. This manipulation of the argument paste_image.image_data causes use of weak hash. The attacker needs to be present on the local network. The attack is considered to have high complexity. The exploitability is assessed as difficult. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
可逆的单向哈希
Source: NVD (National Vulnerability Database)
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Vision Chat Paste Image Handler组件中文件libs/chatchat-server/chatchat/webui_pages/dialogue/dialogue.py的函数PIL.Image.tobytes对参数paste_image.image_data的操作导
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

VendorProductAffected VersionsCPESubscribe
chatchat-spaceLangchain-Chatchat 0.3.1.0 -

II. Public POCs for CVE-2026-7845

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III. Intelligence Information for CVE-2026-7845

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

CVE-2026-78446.3 MEDIUMchatchat-space Langchain-Chatchat Compatible File Service openai_routes.py delete_file mis
CVE-2026-78462.6 LOWchatchat-space Langchain-Chatchat OpenAI-Compatible File Upload API openai_routes.py files
CVE-2026-78472.6 LOWchatchat-space Langchain-Chatchat Uploaded File openai_routes.py _get_file_id random value

IV. Related Vulnerabilities

Same product: Langchain-Chatchat
Same vendor: chatchat-space
Same weakness: CWE-328

V. Comments for CVE-2026-7845

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