EUVD-2026-27390
GHSA-wmvv-fhm6-w34x
CVSS VectorNVD
CVSS:4.0/AV:A/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
2DescriptionNVD
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.
AnalysisAI
Weak hash function in the Vision Chat Paste Image Handler of Langchain-Chatchat up to 0.3.1.3 allows local network attackers with low privileges to cause information disclosure via hash collision attacks on image data processed through PIL.Image.tobytes. The vulnerability requires high attack complexity and local network presence, resulting in minimal direct impact (CVSS 1.2); however, publicly available exploit code exists and the vendor has not responded to disclosure.
Sign in for full analysis, threat intelligence, and remediation guidance.
Share
External POC / Exploit Code
Leaving vuln.today