CVE-2025-6855: A vulnerability, which was classified as critical, has been found in chatchat-space Langchain-Chatchat up to 0.3.1. This
Summary
CVE-2025-6855 is a critical vulnerability in Langchain-Chatchat (a tool built on LLMs) up to version 0.3.1 that allows path traversal (accessing files outside the intended directory) through manipulation of a parameter called 'flag' in the /v1/file endpoint. The vulnerability has been publicly disclosed and could potentially be exploited.
Vulnerability Details
5.5(medium)
EPSS: 0.1%
Classification
Affected Vendors
Related Issues
CVE-2024-27444: langchain_experimental (aka LangChain Experimental) in LangChain before 0.1.8 allows an attacker to bypass the CVE-2023-
CVE-2025-45150: Insecure permissions in LangChain-ChatGLM-Webui commit ef829 allows attackers to arbitrarily view and download sensitive
Original source: https://nvd.nist.gov/vuln/detail/CVE-2025-6855
First tracked: February 15, 2026 at 08:35 PM
Classified by LLM (prompt v3) · confidence: 85%